Final rebrand: rename remaining Rust source file to complete the gsd → forge
transition. All parser references already use forge_parser after earlier commits.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
10 tests that run against the installed gsd binary after npm publish:
1. headless query returns valid JSON
2. Empty project → pre-planning phase
3. Milestone with roadmap → planning phase
4. All tasks done → summarizing phase
5. Complete milestone → complete phase
6. Stale auto.lock doesn't block --version
7. Crash recovery query works with stale lock
8. Non-TTY exits quickly with clean error
9. Version skew detected before TTY check
10. --help works (native addon loads or falls back)
Wired into pipeline.yml test-verify job after fixture tests
and before @next promotion.
These catch the state machine / infrastructure bugs from #1308
that unit tests can't reach — they exercise deriveState through
the real gsd binary with real .gsd/ directory structures.
Part of #1308
