Copy Self to observability shared package

shared/observability/src/airflow_shared/observability/__init__.py

@@ -14,3 +14,13 @@
 # KIND, either express or implied.  See the License for the
 # specific language governing permissions and limitations
 # under the License.
+from __future__ import annotations
+
+import sys
+
+if sys.version_info >= (3, 11):
+    from typing import Self
+else:
+    from typing_extensions import Self
+
+__all__ = ["Self"]

shared/observability/src/airflow_shared/observability/metrics/protocols.py

@@ -22,7 +22,7 @@
 from typing import TYPE_CHECKING, Protocol
 
 if TYPE_CHECKING:
-    from airflow.typing_compat import Self
+    from .. import Self
 
 DeltaType = int | float | datetime.timedelta
 

shared/observability/src/airflow_shared/observability/traces/base_tracer.py

@@ -22,7 +22,7 @@
 import structlog
 
 if TYPE_CHECKING:
-    from airflow.typing_compat import Self
+    from .. import Self
 
 log = structlog.getLogger(__name__)