Add version CLI arg

enroll/version.py

@@ -0,0 +1,32 @@
+from __future__ import annotations
+
+
+def get_enroll_version() -> str:
+    """
+    Best-effort version lookup that works when installed via:
+      - poetry/pip/wheel
+      - deb/rpm system packages
+    Falls back to "0+unknown" when running from an unpacked source tree.
+    """
+    try:
+        from importlib.metadata import (
+            packages_distributions,
+            version,
+        )
+    except Exception:
+        # Very old Python or unusual environment
+        return "unknown"
+
+    # Map import package -> dist(s)
+    dist_names = []
+    try:
+        dist_names = (packages_distributions() or {}).get("enroll", []) or []
+    except Exception:
+        dist_names = []
+
+    # Try mapped dists first, then a reasonable default
+    for dist in [*dist_names, "enroll"]:
+        try:
+            return version(dist)
+        except Exception:
+            return "unknown"