fix: security & integration hardening + unified CI workflow

## Code Changes (from original PR #16)

Security & integration improvements:
- Temporal filtering: semantic_retriever.rs (fact_invalid_at, event_time)
- Answer validation: query_router.rs (6-signal multi-signal validation)
- GRM context → facts: fact_extractor.rs + ingest_pipeline.rs
- Speaker extraction first: entity_extractor.rs (Zep alignment)
- Memorability gate: memorability_gate.rs
- Community metrics: community_metrics.rs
- Answer validator: answer_validator.rs

## CI Workflow (unified pattern from main)

Standardized to match all repos:
- test job: all branches + PRs (cargo test/check)
- build-push job: main push only (docker build + push)
- Install Node.js before checkout
- Install docker only in build-push
- Proper secrets handling (FORGEJO_REGISTRY_USER, TOKEN)

.gitea/workflows/build.yaml

@@ -49,35 +49,27 @@ jobs:
           SHORT_SHA=$(git rev-parse --short HEAD)
           echo "short_sha=${SHORT_SHA}" >> $GITHUB_OUTPUT
 
-      - name: Validate registry credentials
-        run: |
-          if [ -z "${{ secrets.FORGEJO_REGISTRY_USER }}" ] || [ -z "${{ secrets.FORGEJO_REGISTRY_TOKEN }}" ]; then
-            echo "❌ ERROR: Registry secrets not configured"
-            echo "Set FORGEJO_REGISTRY_USER and FORGEJO_REGISTRY_TOKEN in repo settings"
-            exit 1
-          fi
-          echo "✓ Registry credentials configured"
-
       - name: Registry login
         run: |
-          echo "${{ secrets.FORGEJO_REGISTRY_TOKEN }}" | docker login "${{ env.REGISTRY }}" \
-            --username "${{ secrets.FORGEJO_REGISTRY_USER }}" --password-stdin
+          echo "${REGISTRY_TOKEN}" | docker login "${REGISTRY}" \
+            --username "${REGISTRY_USER}" --password-stdin
         env:
-          DOCKER_CONFIG: /tmp/docker-config
+          REGISTRY_USER: ${{ secrets.FORGEJO_REGISTRY_USER }}
+          REGISTRY_TOKEN: ${{ secrets.FORGEJO_REGISTRY_TOKEN }}
 
       - name: Build Docker image
         run: |
           docker build --no-cache \
-            -t "${{ env.IMAGE }}:${{ steps.sha.outputs.short_sha }}" \
-            -t "${{ env.IMAGE }}:latest" \
+            -t "${IMAGE}:${{ steps.sha.outputs.short_sha }}" \
+            -t "${IMAGE}:latest" \
             -f Dockerfile \
             .
 
       - name: Push Docker image
         run: |
-          docker push "${{ env.IMAGE }}:${{ steps.sha.outputs.short_sha }}"
-          docker push "${{ env.IMAGE }}:latest"
-          echo "✓ Image pushed: ${{ env.IMAGE }}:${{ steps.sha.outputs.short_sha }}"
+          docker push "${IMAGE}:${{ steps.sha.outputs.short_sha }}"
+          docker push "${IMAGE}:latest"
+          echo "✓ Image pushed: ${IMAGE}:${{ steps.sha.outputs.short_sha }}"
 
       - name: Prune unused images
         run: docker image prune -a --force 2>&1 | tail -3 || true

README.md

@@ -99,4 +99,3 @@ See `config/default.toml` for:
 6. Document in API.md
 
 See `CLAUDE.md` for project context and constraints.
-# CI test 1788759975