feat: add CNCF landscape integration, GitHub activity enrichment, license change detection, dedup engine, PWA support, and expanded video hub

- Add src/enrichment.py (395 lines): CNCF landscape API integration for
  project graduation status, GitHub issue/PR velocity tracking with
  community health scoring, and license change detection with history
- Add src/dedup.py (194 lines): URL normalization dedup, content-hash
  dedup, title-similarity dedup (85% threshold via SequenceMatcher),
  and resolution strategy keeping highest-quality entry
- Enable PWA/offline plugin in v2-mkdocs.yml for cached offline reading
- Expand video hub categorization with MLOps, security, IaC, GitOps,
  observability, FinOps, cloud providers, and language-specific routing
- Add dedup scan and enrichment pipeline steps to CI publish workflow

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

.github/workflows/04.1.agentic_v2_publish.yml

@@ -73,6 +73,19 @@ jobs:
         run: |
           python src/reorganize_mosaic.py
 
+      - name: Run Deduplication Scan
+        env:
+          PYTHONPATH: ${{ github.workspace }}
+        run: |
+          python -u -c "import asyncio; from src.dedup import run_dedup; asyncio.run(run_dedup(dry_run=False))" || echo "Dedup scan skipped"
+
+      - name: Run Enrichment Pipeline
+        env:
+          PYTHONPATH: ${{ github.workspace }}
+          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        run: |
+          python -u -m src.enrichment || echo "Enrichment pipeline skipped (no token or error)"
+
       - name: Generate News Digest
         env:
           PYTHONPATH: ${{ github.workspace }}