recipe-maintainer: public snapshot (secrets + deployment plans removed, single commit)

Sanitized single-commit public mirror of recipe-maintainer.
- Removed test-ssh/.testenv (live creds); added test-ssh/.testenv.example placeholders.
- Removed plans/ and planned-updates/ (deployment-planning docs) so no client/
  deployment domains appear in the public repo.
- All other secret stores were already gitignored.
- docs.coopcloud.tech retained as a submodule (public upstream).

recipe-info/mumble/tests/health_check.py

@@ -0,0 +1,31 @@
+#!/usr/bin/env python3
+"""Health check for Mumble — tests TCP connectivity to port 64738."""
+import argparse
+import os
+import sys
+
+sys.path.insert(0, os.path.join(os.path.dirname(__file__), '..', '..', '..'))
+from utils.tests.helpers import resolve_server, run
+
+
+def main():
+    parser = argparse.ArgumentParser()
+    parser.add_argument('--server', default=os.environ.get('TEST_SERVER'))
+    args = parser.parse_args()
+    server = args.server or resolve_server()
+
+    print(f"Checking Mumble TCP port 64738 on {server} ...")
+    result = run(
+        f"ssh {server} 'bash -c \"echo > /dev/tcp/localhost/64738\"'",
+        check=False,
+        timeout=15,
+    )
+    if result.returncode == 0:
+        print(f"PASS: Mumble is listening on {server}:64738")
+    else:
+        print(f"FAIL: Could not connect to {server}:64738")
+        sys.exit(1)
+
+
+if __name__ == '__main__':
+    main()