feat(FN-189): add CHANGELOG_AUTOMATION_TOKEN to env schema (+5 more)

Commits merged:
- docs(FN-189): complete Step 7 — update docs/INDEX.md and MEMORY.md
- fix(FN-189): lint fixes — import order, formatting
- test(FN-189): complete Step 4 — add controller spec with 6 token auth scenarios
- feat(FN-189): complete Step 3 — add Fusion changelog automation trigger to deploy workflow
- feat(FN-189): complete Step 2 — add POST /api/changelog/internal endpoint with token auth
- feat(FN-189): complete Step 1 — add CHANGELOG_AUTOMATION_TOKEN to env schema

Files changed:
.fusion/memory/MEMORY.md                           |  16 +++
 .github/workflows/deploy.yml                       |  17 +++
 .../api/src/changelog/changelog.controller.spec.ts | 122 +++++++++++++++++++++
 apps/api/src/changelog/changelog.controller.ts     |  49 ++++++++-
 docs/INDEX.md                                      |   1 +
 packages/config/src/index.ts                       |   3 +
 6 files changed, 207 insertions(+), 1 deletion(-)

Fusion-Task-Id: FN-189

.github/workflows/deploy.yml

@@ -59,3 +59,20 @@ jobs:
             pm2 reload ecosystem.config.js
 
             echo "$(date '+%Y-%m-%d %H:%M:%S') - Deployment complete!"
+
+      # NOTE: This trigger only fires when the GitHub Actions SSH-deploy workflow runs.
+      # Current production deploys are Coolify-driven via git.semih.ai webhooks (see MEMORY.md).
+      # When the GitHub Actions workflow is re-activated for production, this step will
+      # automatically call Fusion to create a changelog entry after a successful deploy.
+      - name: Trigger Fusion changelog automation
+        if: success()
+        continue-on-error: true
+        run: |
+          if [ -z "${{ secrets.FUSION_CHANGELOG_AUTOMATION_ID }}" ] || [ -z "${{ secrets.FUSION_DAEMON_TOKEN }}" ]; then
+            echo "Fusion changelog secrets not configured — skipping automation trigger"
+            exit 0
+          fi
+          curl -sf -X POST \
+            -H "Authorization: Bearer ${{ secrets.FUSION_DAEMON_TOKEN }}" \
+            "https://fusion.semih.ai/api/automations/${{ secrets.FUSION_CHANGELOG_AUTOMATION_ID }}/run?projectId=proj_155fecc31ef14928" \
+            || echo "Fusion trigger failed (non-fatal, continuing)"