Feature: Update consumer logging to include task ID for log correlation (#12510)

src/paperless/tests/test_logging.py

@@ -0,0 +1,34 @@
+import logging
+
+from paperless.logging import ConsumeTaskFormatter
+from paperless.logging import consume_task_id
+
+
+def _make_record(msg: str = "Test message") -> logging.LogRecord:
+    return logging.LogRecord(
+        name="paperless.consumer",
+        level=logging.INFO,
+        pathname="",
+        lineno=0,
+        msg=msg,
+        args=(),
+        exc_info=None,
+    )
+
+
+def test_formatter_includes_task_id_when_set():
+    token = consume_task_id.set("a8098c1a")
+    try:
+        formatter = ConsumeTaskFormatter()
+        output = formatter.format(_make_record())
+        assert "[a8098c1a] Test message" in output
+    finally:
+        consume_task_id.reset(token)
+
+
+def test_formatter_omits_prefix_when_no_task_id():
+    # ContextVar default is "" — no task active
+    formatter = ConsumeTaskFormatter()
+    output = formatter.format(_make_record())
+    assert "[] " not in output
+    assert "Test message" in output