ci(gates): flip file-size to STRICT + restore json-casing gate (W5.5 bookend)

[krisarmstrong]

Summary

Flip the file-size gate to STRICT=1 (all stem god-files now decomposed under the red-flag ceiling) and restore the JSON wire-casing + file-size gates that PR #442 (repo-governance standardization) silently dropped from ci.yml.

Linked Issue

Related to #450

Testing Evidence

$ STRICT=1 ./scripts/check-file-size.sh   # on current main
Found 0 red flag(s), 38 warning(s)        # exit 0
$ ./scripts/check-json-casing.sh
JSON casing gate OK

Security and Release Checklist

• No behavior change to product code (CI-gate config only)
• Restores dropped enforcement (json-casing, file-size) — net security posture improves
• No secrets; no new deps

[github-actions]

License Compliance Report

All dependencies pass license compliance checks

Go Dependencies

• Unknown: 31 package(s)
• MIT: 26 package(s)
• BSD-3-Clause: 16 package(s)
• Apache-2.0: 11 package(s)
• BSD-2-Clause: 1 package(s)

npm Dependencies

See full report in workflow artifacts

Allowed Licenses: MIT, Apache-2.0, BSD-*, ISC, CC0-1.0, MPL-2.0
Forbidden: GPL, AGPL, SSPL (strong copyleft)

[github-actions]

License Compliance Report

All dependencies pass license compliance checks

Go Dependencies

• Unknown: 31 package(s)
• MIT: 26 package(s)
• BSD-3-Clause: 16 package(s)
• Apache-2.0: 11 package(s)
• BSD-2-Clause: 1 package(s)

npm Dependencies

See full report in workflow artifacts

Allowed Licenses: MIT, Apache-2.0, BSD-*, ISC, CC0-1.0, MPL-2.0
Forbidden: GPL, AGPL, SSPL (strong copyleft)