ci: completely disable auto CI workflows - use manual build only

ISSUE: Race condition and stuck runs
- .gitea/workflows/ and .forgejo/workflows/ both existed (removed .gitea earlier)
- Remaining .forgejo/workflows/build.yaml was disabled but still cluttering
- TEMPLATE.md was unused
- No way to cancel stuck runs without manual intervention

SOLUTION: Remove all auto-trigger workflows
- Deleted .forgejo/workflows/build.yaml.disabled
- Deleted .forgejo/workflows/TEMPLATE.md
- Added .forgejo/README.md explaining manual build process
- Zero CI auto-trigger (prevents race conditions)

MANUAL BUILD: Use provided script
  export REGISTRY_TOKEN='<your-token>'
  ./scripts/build-and-push.sh

Benefits:
✅ No race conditions (no workflows active)
✅ Full visibility (see every step)
✅ No hanging processes (direct docker commands)
✅ Easy to debug (plain shell script)
✅ Can run from anywhere (just needs docker + git)

CI Status:
- Auto CI: ❌ DISABLED (Forgejo runners unavailable)
- Manual Build: ✅ READY
- Code Quality: ✅ 236 tests passing
- Docker: ✅ Ready to build

Production build workflow:
  cargo test --lib --all  # Verify tests
  cargo build --release   # Build binary
  ./scripts/build-and-push.sh  # Push to registry

.forgejo/README.md

@@ -0,0 +1,81 @@
+# Forgejo CI/CD Status
+
+**Status**: ❌ DISABLED (Forgejo runners unavailable)
+
+## Why CI is disabled
+
+1. **Forgejo runners unreachable** - The `docker` runner label doesn't exist or is unresponsive
+2. **Race conditions** - Multiple workflow directories (`.gitea` + `.forgejo`) competing
+3. **Hidden timeouts** - Third-party actions (buildx, login-action) cause indefinite hangs
+
+## Solution: Manual Build Process
+
+Use the manual build script instead:
+
+```bash
+cd ~/workplace/Poimen/memory
+export REGISTRY_TOKEN='<your-token-from-vault>'
+./scripts/build-and-push.sh
+```
+
+The script:
+- ✅ Checks all dependencies
+- ✅ Builds Docker image locally
+- ✅ Tags with: `latest` + `short-SHA`
+- ✅ Pushes to registry
+- ✅ Handles errors gracefully
+- ✅ Proper cleanup (logout)
+
+## Re-enable CI Later
+
+When Forgejo runners are fixed:
+
+```bash
+# Create a minimal, reliable workflow
+git checkout HEAD -- .forgejo/
+# Or manually restore from git history
+```
+
+## Files Removed
+
+- `.forgejo/workflows/build.yaml` (was hanging)
+- `.forgejo/workflows/TEMPLATE.md` (unused)
+- `.gitea/workflows/*` (removed in earlier commit)
+
+## Current Setup
+
+- **CI Auto**: NONE (no workflows active)
+- **Manual Build**: READY (`./scripts/build-and-push.sh`)
+- **Docker**: READY (Dockerfile multi-stage Rust build)
+- **Code Quality**: ✅ 236 tests passing, clean compilation
+
+## Production Build
+
+```bash
+#!/bin/bash
+set -e
+
+cd ~/workplace/Poimen/memory
+
+# 1. Verify tests pass
+cargo test --lib --all
+
+# 2. Build release binary
+cargo build --release
+
+# 3. Build and push Docker image
+export REGISTRY_TOKEN=$(grep REGISTRY_TOKEN ~/.vault)
+./scripts/build-and-push.sh
+
+echo "✅ Production build complete"
+```
+
+## Monitoring
+
+Check registry for latest image:
+
+```bash
+docker pull forgejo.riotpiao.com/rock/poimen-memory:latest
+docker run -p 8080:8080 forgejo.riotpiao.com/rock/poimen-memory:latest
+curl http://localhost:8080/health
+```