fix(bronze-freshness): correct openai epoch anchor + align wiki ms-parse

src/ingestion/connectors/ai/openai/dbt/schema.yml

@@ -10,10 +10,16 @@ sources:
     # business bucket), so anchor source-level on it with the report tier;
     # `users` is a full-refresh roster with no bucket column, overridden to the
     # sync-liveness default. Confirm against live data once OpenAI is ingested.
+    #
+    # `bucket_start_time` is Unix **seconds** (an integer), not a date string —
+    # see the connector's own dbt models (to_ai_cost.sql / to_ai_tool_usage.sql:
+    # `toDate(fromUnixTimestamp(CAST(bucket_start_time AS UInt32)))`). Use the
+    # matching epoch conversion here; `parseDateTimeBestEffortOrNull` would fail
+    # on an integer.
     freshness:
       warn_after: {count: 72, period: hour}
       error_after: {count: 120, period: hour}
-    loaded_at_field: parseDateTimeBestEffortOrNull(bucket_start_time)
+    loaded_at_field: fromUnixTimestamp(CAST(bucket_start_time AS UInt32))
     schema: bronze_openai
     tables:
       - name: users   # roster — no bucket column; sync-liveness default

src/ingestion/connectors/wiki/confluence/dbt/schema.yml

@@ -17,7 +17,9 @@ sources:
     tables:
       - name: wiki_spaces
       - name: wiki_pages   # inferred windowed/event (updated_at)
-        loaded_at_field: parseDateTimeBestEffortOrNull(updated_at)
+        # ms-precision parse to match the connector's own model convention
+        # (confluence__wiki_pages: parseDateTime64BestEffortOrNull(updated_at, 3)).
+        loaded_at_field: parseDateTime64BestEffortOrNull(updated_at, 3)
         freshness:
           warn_after: {count: 96, period: hour}
           error_after: {count: 168, period: hour}

src/ingestion/connectors/wiki/outline/dbt/schema.yml

@@ -15,7 +15,9 @@ sources:
     tables:
       - name: wiki_spaces
       - name: wiki_pages   # inferred windowed/event (updated_at)
-        loaded_at_field: parseDateTimeBestEffortOrNull(updated_at)
+        # ms-precision parse to match the connector's own model convention
+        # (outline__wiki_pages: parseDateTime64BestEffortOrNull(updated_at, 3)).
+        loaded_at_field: parseDateTime64BestEffortOrNull(updated_at, 3)
         freshness:
           warn_after: {count: 96, period: hour}
           error_after: {count: 168, period: hour}