Add more meta information to trove entries

trovedb/trovedb.py

@@ -8,6 +8,7 @@ tree serialization respectively.
 
 from typing import Optional, Self
 from pathlib import Path
+import datetime as dt
 
 from .db import Sqlite3Trove, NOTE_ROOT_ID
 from .tree import Tree as TreeData
@@ -30,6 +31,20 @@ class NoteImpl(Note):
     def object_id(self) -> int:
         return self._object_id
 
+    @property
+    def readonly(self) -> bool:
+        return False
+
+    @property
+    def mtime(self) -> dt.datetime:
+        """Return modification time as Unix timestamp, or None if not set."""
+        return self._db.get_mtime(self._object_id)
+
+    @property
+    def mime(self) -> str:
+        """Return MIME type, defaulting to generic binary stream."""
+        return "application/octet-stream"
+
     def get_raw_metadata(self, key: str) -> Optional[bytes]:
         return self._db.read_metadata(self._object_id, key)