fix(release): sync extension evidence after asset inputs

[f0rr0]

Summary

• Refresh extension evidence after release sync updates the WASIX asset input fingerprint.
• Commit the regenerated transitional evidence digest and generated evidence table for the current main release state.
• Keep future generated release PRs from breaking extension-native lanes after release-derived asset inputs change.

Validation

• python3 src/extensions/tools/check-extension-model.py --check
• tools/release/sync_release_pr.py --check
• tools/release/release.py check
• bun tools/policy/assertions/assert-source-inputs.mjs extensions
• python3 -m py_compile tools/release/sync_release_pr.py src/extensions/tools/check-extension-model.py
• git diff --check