Finalize SSOT contract and source validation

[medhatgalal]

Summary

• finalize the skill-first surface contract and canonical display-name ownership
• add canonical SSOT source validation for duplicate frontmatter, display-name drift, and benchmark-tier contract sections
• uplift weaker SSOT bodies, regenerate surfaces, and align deploy/tests/wrappers with the new model

Validation

• python3.11 scripts/build-surfaces.py
• python3.11 scripts/sync-surface-specs.py
• python3.11 scripts/validate-surfaces.py --strict
• python3.11 -m pytest -q
• python3.11 scripts/smoke-clis.py
• scripts/deploy-surfaces.sh --dry-run --cli all
• scripts/package-surfaces.sh --version v1.4.5 --output-dir /Users/medhat.galal/Desktop/Core-Prompts/dist

Notes

• smoke completes with a non-blocking Gemini discovery warning; generated Gemini skill files are present and validation is green locally
• release artifacts were built into dist/ as v1.4.5 packages