Add OpenStack request-body schemas and nested console PARAM sync.

app/openstack/singular.py

@@ -0,0 +1,33 @@
+"""Shared plural→singular helpers for OpenStack resource keys."""
+
+from __future__ import annotations
+
+# Words that already look plural-ending but must not lose a trailing "s".
+_IRREGULAR: dict[str, str] = {
+    "status": "status",
+    "statuses": "status",
+    "addresses": "address",
+    "quotas": "quota",
+    "metadata": "metadata",
+    "series": "series",
+    "os-services": "os-service",
+    "os-hosts": "os-host",
+}
+
+
+def singular(collection_key: str) -> str:
+    """Return a singular resource key for an OpenStack collection name."""
+
+    key = collection_key.strip()
+    if not key:
+        return key
+    lower = key.lower()
+    if lower in _IRREGULAR:
+        return _IRREGULAR[lower]
+    if key.endswith("ies") and len(key) > 3:
+        return key[:-3] + "y"
+    if key.endswith("ses") and len(key) > 3:
+        return key[:-2]
+    if key.endswith("s") and not key.endswith("ss"):
+        return key[:-1]
+    return key