ci: full CI/CD pipeline via Gitea Actions

Replaces the minimal CI workflow with a complete build/release pipeline:
- lint, typecheck, test (parallel, every push/PR)
- build: TS + completions + bun binaries + RPM packaging
- docker: build & push all 4 images (mcpd, node-runner, python-runner, docmost-mcp)
- publish-rpm: upload RPM to Gitea packages
- deploy: update Portainer stack

Also adds scripts/link-package.sh shared helper to auto-link packages
to the repository (Gitea 1.24+ API with graceful fallback), called from
all build/publish scripts.

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

scripts/build-python-runner.sh

@@ -28,5 +28,9 @@ podman login --tls-verify=false -u michal -p "$GITEA_TOKEN" "$REGISTRY"
 echo "==> Pushing to $REGISTRY/michal/$IMAGE:$TAG..."
 podman push --tls-verify=false "$REGISTRY/michal/$IMAGE:$TAG"
 
+# Ensure package is linked to the repository
+source "$SCRIPT_DIR/link-package.sh"
+link_package "container" "$IMAGE"
+
 echo "==> Done!"
 echo "    Image: $REGISTRY/michal/$IMAGE:$TAG"