add timestamps

database.py

···
 from dataclasses import dataclass
+from datetime import datetime, timezone
 import logging
 import sys
 from typing import List, Optional
···
                     field_schema=PayloadSchemaType.KEYWORD,
                 )
                 self._client.create_payload_index(
-                    collection_name=self.avatar_collection_name,
+                    collection_name=self.profile_collection_name,
                     field_name="timestamp",
                     field_schema=PayloadSchemaType.DATETIME,
                 )
···
                     field_schema=PayloadSchemaType.KEYWORD,
                 )
                 self._client.create_payload_index(
-                    collection_name=self.avatar_collection_name,
+                    collection_name=self.post_collection_name,
                     field_name="timestamp",
                     field_schema=PayloadSchemaType.DATETIME,
                 )
···
             payload = {
                 "did": did,
                 "description": description,
+                "timestamp": create_now_timestamp(),
             }
 
             existing = self._client.scroll(
···
             payload = {
                 "did": did,
                 "cid": cid,
+                "timestamp": create_now_timestamp(),
             }
 
             existing = self._client.scroll(
···
                 "did": did,
                 "uri": uri,
                 "text": text,
+                "timestamp": create_now_timestamp(),
             }
 
             # we don't care about upserting these
···
 
 
 QDRANT_SERVICE = QdrantService()
+
+
+def create_now_timestamp():
+    return datetime.now(timezone.utc).isoformat()