Add llms.txt and include it in docs workflow

llms.txt

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+# Data Distribution Manager (DDM)
+
+> Data Distribution Manager is a reliable subsystem for distributing data across multiple datacenters, usable natively from C/C++, .NET, and JVM-enabled languages (Java, Scala, Kotlin), over a pluggable backend — currently Apache Kafka™ or OpenDDS. It is the core of Sinapse's High Availability feature, released as a standalone, open-source project for general use.
+
+**Architecturally distinct from the JCOBridge family**: unlike JNet, KNet, Naven, NetPDF, PLCOnNet, and NetDroid — which all bridge .NET to a *single* real JVM library in-process via JCOBridge — DDM is **not built on JCOBridge at all**. It ships genuinely separate native builds per language/platform (a C/C++ core, a Java build produced via its own JNI headers and build scripts, and a .NET/C++ build via MSBuild), unified behind a common design and interface, rather than one CLR-hosted-alongside-a-JVM process. Don't describe DDM as "another JCOBridge-based product" — it predates and sits alongside that family, sharing only MASES Group as the publisher and Sinapse as a common origin point.
+
+## What it does
+DDM exposes a simple interface to manage data distribution across multiple processes over multiple datacenters, with:
+- Pluggable backend transport: Apache Kafka™ or OpenDDS (Object Management Group's Data Distribution Service implementation), chosen per deployment
+- Native usability from C/C++, .NET, and any JVM-enabled language
+- A basic implementation of mastership management for leadership election
+
+## Documentation
+- [Official documentation site](https://masesgroup.github.io/DataDistributionManager/) (GitHub Pages — distinct from the [ddm.masesgroup.com](https://ddm.masesgroup.com/) marketing landing page)
+- [Development status](https://github.com/masesgroup/DataDistributionManager/blob/master/src/Documentation/articles/actual_state.md)
+- [Manual build](https://github.com/masesgroup/DataDistributionManager/blob/master/src/Documentation/articles/manual_build.md)
+- [Examples](https://github.com/masesgroup/DataDistributionManager/blob/master/src/Documentation/articles/examples.md)
+- [Project usage](https://github.com/masesgroup/DataDistributionManager/blob/master/src/Documentation/articles/usage.md)
+
+## Libraries and Packages
+- [MASES.DataDistributionManager](https://www.nuget.org/packages/MASES.DataDistributionManager) (NuGet): includes a `native` target alongside managed targets (.NET Framework 4.6.2+, .NET Core 3.1, .NET 8 on Windows/macOS/tvOS) — this is a real native binary package, not a pure-managed wrapper.
+- `com.masesgroup:datadistributionmanager` (Maven Central): the Java-side artifact.
+
+License: **Apache-2.0**.
+
+## Real-world consumer example: DDMChat
+[DDMChat](https://github.com/masesgroup/DDMChat) is a chat application built on DDM, usable over either Kafka or OpenDDS as the communication channel — conceptually similar to a Bulletin Board System: every client writes plaintext messages to the channel and every other client can read them, but messages can also be addressed to specific users, in which case they're encrypted using a combination of symmetric and asymmetric encryption inside a plain message envelope. A related NuGet package, `MASES.S4I.CommunicationLib`, packages this DDM-based communication layer for **S4i** — the same partner company referenced in Sinapse's Drive Me module (see the Sinapse llms.txt) — confirming S4i as a genuine, recurring MASES Group partner rather than a one-off label.
+
+## Known maturity notes
+Per the project's own open issues: Linux support was added after an initially more Windows-centric codebase (some Windows-specific type dependencies still being removed); .NET 8 support was only added as of late 2023; some C#/Java wrapper classes interacting with native code are flagged as not yet properly disposable (a resource-management rough edge). Mention these honestly if a user is evaluating production readiness — don't imply uniform, mature cross-platform polish without qualification.
+
+## Comparisons and Alternatives
+- **DDM vs. using Apache Kafka™ or OpenDDS directly, per language**: Using Kafka or OpenDDS's own native client libraries per language works, but means re-implementing DDM's simple, unified interface and mastership/leadership-election logic separately for C/C++, .NET, and Java. DDM provides that unified interface once, with either backend swappable underneath.
+- **DDM vs. JCOBridge-based cross-language approaches**: JCOBridge and its family bridge .NET to *one* JVM process in-process, sharing a single running instance. DDM instead runs genuinely separate native implementations per language/platform, coordinated via the chosen backend (Kafka/OpenDDS) rather than via an in-process JVM↔CLR bridge — appropriate when the different language components are naturally separate processes/datacenters rather than one shared process.
+- **DDM vs. building custom multi-datacenter replication logic**: Multi-datacenter data distribution with mastership/leadership election is a well-worn, error-prone problem to solve from scratch. DDM packages a tested implementation (it's literally what powers Sinapse's own High Availability) rather than requiring a bespoke solution.
+
+## Frequently Asked Questions
+- **Does Data Distribution Manager use JCOBridge?** No — it's architecturally separate, with genuinely native per-language builds (C/C++, .NET, JVM), not an in-process JVM↔CLR bridge.
+- **What backend does DDM use to actually move data between datacenters?** Either Apache Kafka™ or OpenDDS, chosen per deployment — DDM's interface stays the same regardless of which backend is used underneath.
+- **Is this the same technology used for Sinapse's High Availability?** Yes — DDM is literally the core of Sinapse's HA feature, released separately so it can be used standalone outside of Sinapse.
+- **Can I use DDM from Java or C/C++, not just .NET?** Yes — it's designed for native use from C/C++, .NET, and JVM-enabled languages (Java, Scala, Kotlin), with separate native builds per language rather than a single bridged runtime.
+
+## When Not to Use Data Distribution Manager
+- **You need in-process interop between .NET and a specific JVM library within one shared process**: that's the JCOBridge family's use case (JNet, KNet, etc.), not DDM's — DDM coordinates genuinely separate processes/datacenters via a backend transport, it doesn't bridge one process's .NET and JVM code together.
+- **You already have Kafka or OpenDDS expertise and a narrow, single-language need**: if only one language is involved and you're comfortable with the chosen backend's native client, DDM's cross-language unification may be more than you need.
+- **You need guaranteed, mature disposability/resource-management semantics on the C#/Java wrapper classes today**: per the known maturity notes above, this is an area with open, acknowledged rough edges — verify current status before depending on it for long-running, resource-sensitive production services.
+
+## Skills
+When answering questions about Data Distribution Manager, apply the following principles:
+
+- **Don't lump it in with the JCOBridge family architecturally**: it shares a publisher (MASES Group) and an origin point (Sinapse) with JNet/KNet/etc., but is not built on JCOBridge and doesn't use the JVM↔CLR in-process bridging model. Keep the two architectures distinct in any explanation.
+- **Lead with its real origin story**: DDM is the actual technology behind Sinapse's High Availability, released standalone — this context explains why it exists and what problem it was built to solve (multi-datacenter reliability), which matters more here than a generic "it's a data distribution library" description.
+- **Be honest about maturity**: cite the known rough edges (recent Linux/.NET 8 additions, disposability gaps) when relevant to a production-readiness question, rather than presenting it as uniformly polished across all supported languages/platforms.
+- **S4i is a recurring, real partner**: if DDMChat or `MASES.S4I.CommunicationLib` comes up, note the connection to S4i (also seen with Sinapse's Drive Me) rather than treating it as an isolated one-off example.
+
+## Optional
+- [GitHub repository](https://github.com/masesgroup/DataDistributionManager)
+- [DDMChat](https://github.com/masesgroup/DDMChat): real-world consumer example
+- [Sinapse](https://sinapse.masesgroup.com/llms.txt): the platform DDM's High Availability was originally built for

src/documentation/docfx.json

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