feat(proof): PROOF9 quality memory system (#422)

## Summary
- New `codeframe/core/proof/` package (8 modules, ~1300 lines)
- 9 proof gates, SQLite ledger, glitch classification, scope intersection
- Evidence system with SHA-256 checksums
- Waiver system with expiry tracking
- 6 CLI commands: capture, run, list, show, waive, status
- 42 new tests, all 1924 existing tests pass

## Validation
- Review feedback: 11 items addressed (4 critical, 3 major, 4 deferred)
- Demo: All 10 acceptance criteria verified
- Tests: 42/42 passing + 1924 existing
- CI: All checks green

Closes #422

Author: frankbria

codeframe/cli/app.py

@@ -5158,6 +5158,10 @@ def templates_apply(
 app.add_typer(hooks_app, name="hooks")
 app.add_typer(stats_app, name="stats")
 
+from codeframe.cli.proof_commands import proof_app  # noqa: E402
+
+app.add_typer(proof_app, name="proof")
+
 
 # =============================================================================
 # Version command