docs: Add Gitea API automation guide to AGENTS.md and CLAUDE.md

Enhance project governance with CI/CD automation capabilities:

AGENTS.md additions:
- v16.0 Gitea API & CI/CD Automation section
- Environment setup (GITEA_TOKEN_TAXBAIK)
- Common API patterns (PR comments, labels, releases)
- Gitea Actions workflow integration
- Automation best practices (labels, milestones, release tagging)

CLAUDE.md additions:
- Gitea API setup instructions
- Practical automation tasks (build verification, auto-labeling, debt tracking)
- Gitea Actions integration example for PR verification

This enables:
- Automated PR verification comments with test results
- Auto-labeling by affected modules
- Tech debt tracking via issue linking
- Release management automation
- CI/CD pipeline transparency

Co-Authored-By: Claude Haiku 4.5 <noreply@anthropic.com>

AGENTS.md

@@ -70,6 +70,84 @@
 - J39 and every new schedule remain disabled until their source, calendar, ownership and alert contracts are approved.
 - Never claim .NET, pnpm, PostgreSQL, Playwright or Shadow evidence passed unless the actual artifact is attached.
 
+## v16.0 Gitea API & CI/CD Automation
+
+### Environment Setup
+
+**Gitea API Token:**
+```bash
+# Set GITEA_TOKEN_TAXBAIK environment variable
+# This token enables:
+# - Pull request automation (labels, milestones, comments)
+# - Issue management (create, update, close)
+# - Release management (tags, release notes)
+# - CI/CD pipeline integration
+
+# On Windows (PowerShell):
+$env:GITEA_TOKEN_TAXBAIK = "your-token-here"
+
+# On macOS/Linux (bash):
+export GITEA_TOKEN_TAXBAIK="your-token-here"
+
+# Verify:
+echo $GITEA_TOKEN_TAXBAIK
+```
+
+### Gitea API Patterns
+
+**Common endpoints (https://gitea.taxbaik.com/api/v1):**
+
+```bash
+# Create a PR comment
+curl -X POST \
+  -H "Authorization: token $GITEA_TOKEN_TAXBAIK" \
+  -H "Content-Type: application/json" \
+  -d '{"body":"Verification complete: 41/41 tests passed"}' \
+  https://gitea.taxbaik.com/api/v1/repos/kjh2064/KArtSell.Aegis/issues/{issue_id}/comments
+
+# Add labels to PR
+curl -X POST \
+  -H "Authorization: token $GITEA_TOKEN_TAXBAIK" \
+  -d '["architecture","verified"]' \
+  https://gitea.taxbaik.com/api/v1/repos/kjh2064/KArtSell.Aegis/issues/{pr_number}/labels
+
+# Create release with notes
+curl -X POST \
+  -H "Authorization: token $GITEA_TOKEN_TAXBAIK" \
+  -H "Content-Type: application/json" \
+  -d '{"tag_name":"v16.0.1","body":"Release notes..."}' \
+  https://gitea.taxbaik.com/api/v1/repos/kjh2064/KArtSell.Aegis/releases
+
+# Query PR/Issue
+curl -H "Authorization: token $GITEA_TOKEN_TAXBAIK" \
+  https://gitea.taxbaik.com/api/v1/repos/kjh2064/KArtSell.Aegis/pulls?state=open
+```
+
+### CI/CD Integration (Gitea Actions)
+
+**Leverage in `.gitea/workflows/ci.yml`:**
+
+```yaml
+- name: Comment on PR with test results
+  if: github.event_name == 'pull_request'
+  run: |
+    curl -X POST \
+      -H "Authorization: token ${{ secrets.GITEA_TOKEN }}" \
+      -H "Content-Type: application/json" \
+      -d "{\"body\":\"Build: ✅ Tests: 41/41 PASS\"}" \
+      https://gitea.taxbaik.com/api/v1/repos/kjh2064/KArtSell.Aegis/issues/${{ github.event.pull_request.number }}/comments
+```
+
+### Automation Best Practices (from v16.0)
+
+- **PR Labels:** Auto-label based on affected module (e.g., `ModelOperations`, `SignalEngine`)
+- **Milestones:** Link PRs to quarterly sprints for burndown tracking
+- **Comments:** Post verification results (build, test, security scan) directly on PR
+- **Releases:** Tag with semver + architecture contract version (e.g., `v16.0.1-contract-v3.0`)
+- **Issue Linking:** Reference debt IDs, ADRs, decision logs in commits (e.g., `TECH-001: Fix CA1822`)
+
+---
+
 ## v16.0 Strategic Architecture & Engineering Excellence
 
 ### Decision Criteria for All Work