docs: bump CONFORMANCE.md header date to v1.0.0 release date (2026-07-02)

Version already read v1.0.0 but the date was still v0.5.0's (2026-06-23).

Co-Authored-By: Claude Opus 4.8 <[email protected]>

Author: snapsynapse

CONFORMANCE.md

@@ -1,6 +1,6 @@
 # Conformance — Turnfile
 
-Version: v1.0.0 (protocol) · 2026-06-23
+Version: v1.0.0 (protocol) · 2026-07-02
 
 ## v1 Minimal Governance Profile