fix: pass datetime objects to sessions API instead of ISO strings

`get_sessions_for_team` was calling `_to_iso()` which produced strings,
but the generated `sync_detailed` client expects `datetime.datetime`
objects and calls `.isoformat()` internally — causing an AttributeError.
Bump version to 0.1.1.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: mad4ms

pyproject.toml

@@ -1,6 +1,6 @@
 [project]
 name = "kinexon-handball-api"
-version = "0.1.0"
+version = "0.1.1"
 description = "A Python wrapper for accessing and processing Kinexon Handball data."
 authors = [
     { name = "Michael Adams", email = "m@ad4ms.de" }

src/kinexon_handball_api/handball.py

@@ -63,10 +63,6 @@ def _handle_response(
             return cast(T, response.parsed)
         return default
 
-    @staticmethod
-    def _to_iso(value: datetime | str) -> str:
-        return value.isoformat() if isinstance(value, datetime) else value
-
     def get_team_ids(self, season: str | None = None) -> list[TeamEntry]:
         """Return team IDs for a season (or default season behavior)."""
         return fetch_team_ids(season)
@@ -98,10 +94,17 @@ def get_sessions_for_team(
         end: datetime | str,
     ) -> Any:
         self._require_value("team_id", team_id)
+
+        # Convert strings to datetime objects if necessary
+        if isinstance(start, str):
+            start = datetime.fromisoformat(start)
+        if isinstance(end, str):
+            end = datetime.fromisoformat(end)
+
         resp = get_public_v1_teams_by_team_id_sessions_and_phases.sync_detailed(
             team_id=team_id,
-            min_=self._to_iso(start),
-            max_=self._to_iso(end),
+            min_=start,
+            max_=end,
             client=self.client,
         )
         return self._handle_response(resp, "sessions_for_team", {})