feat: Generate a status-discriminated action attempt union

[razor-x]

What this means for SDK users

ActionAttempt is now a union with one member per action_type × status, so TypeScript knows exactly when error and result are real objects and when they are null:

const attempt = await seam.locks.lockDoor(
  { device_id },
  { waitForActionAttempt: false },
)

// Before: this compiled and crashed at runtime (result is null while pending).
// Now: it does not compile.
attempt.result.was_confirmed_by_device

// Narrow on status — no null checks needed:
if (attempt.status === 'success') {
  attempt.result.was_confirmed_by_device // ok, result is an object here
}
if (attempt.status === 'error') {
  attempt.error.message // ok, error is an object here
}
if (attempt.status === 'pending') {
  attempt.error  // typed null
  attempt.result // typed null
}

SucceededActionAttempt<T> / FailedActionAttempt<T> now actually extract those members:

type Succeeded = SucceededActionAttempt<ActionAttempt>
// = every { status: 'success' } member, with non-null result

Runtime behavior is unchanged — the API always sent null; the types just stopped lying about it.

How

Bumps @seamapi/blueprint to ^1.10.0. Blueprint now annotates each action-attempt property with the statuses that populate it (error → ['error'], result → ['success']). Codegen expands each action attempt into one union member per status: status becomes the literal, annotated properties keep their type in listed statuses and render as null otherwise. Nothing is keyed off the names error/result. Supersedes #1007.

Verification

Type-level tests cover the four snippets above plus resolveActionAttempt returning the success type. 177 tests, typecheck, lint green. Regeneration from a clean install reproduces the diff exactly; tsc time and editor completion latency are unchanged (generated file 61 KB → 79 KB).

🤖 Generated with Claude Code

https://claude.ai/code/session_01EdWS7o3htQ9cNxhCWL5Frp