V45 Gate 18: Prove promotion readiness

Adds the V45 promotion readiness report, generator, checker, protocol exports, package tests, and canon-promotion workflow. Wires V45 promotion support into PROVEN generation, promotion scripts, V45 spec-family docs, roadmap, CI quality workflows, and generated artifacts so the version branch can be validated and promoted from V44 to V45 with a V46 draft posture.

Validated with V45 artifact freshness checks, Gates 16-18, V45 draft/canonical/posture checks, protocol typecheck, protocol tests, import casing, diff hygiene, secret-pattern scan, and V45 promotion dry run.

Author: geraldarthurdavis

.bitcode/v45-canonical-input-report.json

@@ -26,7 +26,8 @@
     ".bitcode/v45-settlement-source-to-shares-proof.json",
     ".bitcode/v45-disclosure-boundary-proof.json",
     ".bitcode/v45-proof-contract-proof.json",
-    ".bitcode/v45-source-safe-e2e-rehearsal.json"
+    ".bitcode/v45-source-safe-e2e-rehearsal.json",
+    ".bitcode/v45-promotion-readiness-report.json"
   ],
-  "requiredGeneratedArtifactCount": 12
+  "requiredGeneratedArtifactCount": 13
 }