docs: add missing container_runtime.rs to architecture tree

[github-actions]

Agent Documentation Update

Findings

Area	Issue	File(s)
accuracy	src/compile/extensions/container_runtime.rs (typed Docker runtime configuration for MCPG stdio servers: mounts, mount modes) exists in the codebase but was missing from the extensions/ architecture-tree listing in AGENTS.md	AGENTS.md

Applied Fixes

• Added a container_runtime.rs entry with a one-line description to the src/compile/extensions/ tree in AGENTS.md, alongside the existing azure_cli.rs and tests.rs entries.

Notes

Verified against the current file tree (find src -type f -name '*.rs') and cross-checked every other module directory (compile/ir, compile/ir/tasks, compile/shell, compile/imports, compile/codemods, safe_outputs, runtimes/*, tools/*, ado, ado_proxy, audit/*, inspect, mcp_author, data) against AGENTS.md's tree — no other discrepancies found. Also confirmed every safe-output tool module under src/safe_outputs/ is documented in docs/safe-outputs.md's tool matrix, and that variable-groups:/supply-chain: front-matter fields are documented. This was the only drift found, so scope was kept to this single accurate fix.

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Created by the agent-documentation maintainer workflow.

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