[python] Update PyPaimon Snapshot fields to not null

Author: JingsongLi

paimon-python/pypaimon/snapshot/snapshot.py

@@ -27,21 +27,20 @@
 @dataclass
 class Snapshot:
     # Required fields
+    version: int = json_field("version")
     id: int = json_field("id")
     schema_id: int = json_field("schemaId")
     base_manifest_list: str = json_field("baseManifestList")
     delta_manifest_list: str = json_field("deltaManifestList")
+    total_record_count: int = json_field("totalRecordCount")
+    delta_record_count: int = json_field("deltaRecordCount")
     commit_user: str = json_field("commitUser")
     commit_identifier: int = json_field("commitIdentifier")
     commit_kind: str = json_field("commitKind")
     time_millis: int = json_field("timeMillis")
     # Optional fields with defaults
-    version: Optional[int] = json_field("version", default=None)
-    log_offsets: Optional[Dict[int, int]] = json_field("logOffsets", default_factory=dict)
     changelog_manifest_list: Optional[str] = json_field("changelogManifestList", default=None)
     index_manifest: Optional[str] = json_field("indexManifest", default=None)
-    total_record_count: Optional[int] = json_field("totalRecordCount", default=None)
-    delta_record_count: Optional[int] = json_field("deltaRecordCount", default=None)
     changelog_record_count: Optional[int] = json_field("changelogRecordCount", default=None)
     watermark: Optional[int] = json_field("watermark", default=None)
     statistics: Optional[str] = json_field("statistics", default=None)

paimon-python/pypaimon/tests/rest/rest_catalog_commit_snapshot_test.py

@@ -60,8 +60,7 @@ def setUp(self):
             commit_user="test_user",
             commit_identifier=12345,
             commit_kind="APPEND",
-            time_millis=int(time.time() * 1000),
-            log_offsets={}
+            time_millis=int(time.time() * 1000)
         )
 
         # Create test statistics

paimon-python/pypaimon/tests/rest/rest_server.py

@@ -544,8 +544,7 @@ def _write_snapshot_files(self, identifier: Identifier, snapshot, statistics):
             "commitUser": getattr(snapshot, 'commit_user', 'rest-server'),
             "commitIdentifier": getattr(snapshot, 'commit_identifier', 1),
             "commitKind": getattr(snapshot, 'commit_kind', 'APPEND'),
-            "timeMillis": getattr(snapshot, 'time_millis', 1703721600000),
-            "logOffsets": getattr(snapshot, 'log_offsets', {})
+            "timeMillis": getattr(snapshot, 'time_millis', 1703721600000)
         }
 
         with open(snapshot_file, 'w') as f:

paimon-python/pypaimon/write/file_store_commit.py

@@ -199,7 +199,7 @@ def _try_commit(self, commit_kind, commit_entries, commit_identifier):
         new_snapshot_id = self._generate_snapshot_id()
         total_record_count += delta_record_count
         snapshot_data = Snapshot(
-            version=1,
+            version=3,
             id=new_snapshot_id,
             schema_id=self.table.table_schema.id,
             base_manifest_list=base_manifest_list,