docs(bf-24wu4): update plan.md layout to v1.2 with shipped workspace reconciliation
- Update version from 1.1 to 1.2 (dated 2026-07-05)
- Add revision 1.2 entry documenting workspace reconciliation
- Expand File and Module Layout tree to include all shipped artifacts:
- crates/pdftract-libpdftract (C ABI)
- crates/pdftract-cer-diff (CER diff tool)
- crates/pdftract-schema-migrate (schema migration tool)
- xtask/ (build automation utilities)
- sdk/ (PHP and Python subprocess SDKs)
- templates/sdk-skeleton/ (SDK template)
- e2e/phone-smoke/ (E2E phone smoke tests)
- profiles/ (built-in and community profiles)
- ci/ (CI gate scripts)
- tools/ (fixture generation and debugging tools)
- docs/user-docs/ (user-facing documentation)
- Language SDK repositories (Node, Java, .NET, Go, Ruby, PHP, Swift)
- Add SDK cross-reference to docs/notes/sdk-architecture.md
- No semantic changes to phase specifications
Verification: notes/bf-24wu4.md
Closes: bf-24wu4