Fix 403 for invited members streaming audio and 500 on invite listing

Invited members have no Nextcloud credentials of their own — stream and
waveform endpoints now use the file uploader's NC credentials instead of
the current member's. Falls back to the current member if uploaded_by is
null.

The invite listing/info endpoints were comparing timezone-aware
expires_at values against naive datetime.now(), causing a TypeError (500).
Fixed by using datetime.now(timezone.utc) throughout bands.py and
invites.py.

Also removes leftover debug logging from versions.py.

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

api/tests/integration/test_versions_streaming.py

@@ -1,11 +1,12 @@
 """Integration tests for version streaming endpoints."""
 
 import pytest
+import uuid
 from unittest.mock import AsyncMock, patch, MagicMock
 import httpx
 
 from rehearsalhub.routers.versions import stream_version, get_waveform
-from rehearsalhub.db.models import Member, AudioVersion
+from rehearsalhub.db.models import Member, AudioVersion, Song
 from rehearsalhub.schemas.audio_version import AudioVersionRead
 
 
@@ -15,24 +16,27 @@ async def test_stream_version_connection_error():
     """Test stream_version endpoint handles connection errors gracefully."""
     # Mock dependencies
     mock_session = MagicMock()
-    mock_member = Member(id=1, name="Test User")
+    mock_member = Member(id=uuid.uuid4())
     
-    # Mock version with nc_file_path
+    # Mock song and version
+    mock_song = Song(id=uuid.uuid4(), band_id=uuid.uuid4())
     mock_version = AudioVersion(
         id="test-version-id",
+        song_id=mock_song.id,
         nc_file_path="test/path/file.mp3",
-        waveform_url="test/path/waveform.json"
+        waveform_url="test/path/waveform.json",
+        version_number=1
     )
     
     # Mock the storage client to raise connection error
     with patch("rehearsalhub.routers.versions.NextcloudClient") as mock_client_class:
         mock_client = MagicMock()
         mock_client.download = AsyncMock(side_effect=httpx.ConnectError("Connection failed"))
-        mock_client_class.return_value = mock_client
+        mock_client_class.for_member.return_value = mock_client
         
         # Mock the membership check
         with patch("rehearsalhub.routers.versions._get_version_and_assert_band_membership", 
-                  return_value=(mock_version, None)):
+                  return_value=(mock_version, mock_song)):
             
             from fastapi import HTTPException
             
@@ -45,7 +49,7 @@ async def test_stream_version_connection_error():
             
             # Should return 503 Service Unavailable
             assert exc_info.value.status_code == 503
-            assert "Failed to connect to storage" in str(exc_info.value.detail)
+            assert "Storage service unavailable" in str(exc_info.value.detail)
 
 
 @pytest.mark.asyncio
@@ -54,13 +58,16 @@ async def test_stream_version_file_not_found():
     """Test stream_version endpoint handles 404 errors gracefully."""
     # Mock dependencies
     mock_session = MagicMock()
-    mock_member = Member(id=1, name="Test User")
+    mock_member = Member(id=uuid.uuid4())
     
-    # Mock version with nc_file_path
+    # Mock song and version
+    mock_song = Song(id=uuid.uuid4(), band_id=uuid.uuid4())
     mock_version = AudioVersion(
         id="test-version-id",
+        song_id=mock_song.id,
         nc_file_path="test/path/file.mp3",
-        waveform_url="test/path/waveform.json"
+        waveform_url="test/path/waveform.json",
+        version_number=1
     )
     
     # Mock the storage client to raise 404 error
@@ -75,11 +82,11 @@ async def test_stream_version_file_not_found():
         mock_client.download = AsyncMock(
             side_effect=httpx.HTTPStatusError("Not found", request=MagicMock(), response=mock_response)
         )
-        mock_client_class.return_value = mock_client
+        mock_client_class.for_member.return_value = mock_client
         
         # Mock the membership check
         with patch("rehearsalhub.routers.versions._get_version_and_assert_band_membership", 
-                  return_value=(mock_version, None)):
+                  return_value=(mock_version, mock_song)):
             
             from fastapi import HTTPException
             
@@ -101,24 +108,27 @@ async def test_get_waveform_connection_error():
     """Test get_waveform endpoint handles connection errors gracefully."""
     # Mock dependencies
     mock_session = MagicMock()
-    mock_member = Member(id=1, name="Test User")
+    mock_member = Member(id=uuid.uuid4())
     
-    # Mock version with waveform_url
+    # Mock song and version
+    mock_song = Song(id=uuid.uuid4(), band_id=uuid.uuid4())
     mock_version = AudioVersion(
         id="test-version-id",
+        song_id=mock_song.id,
         nc_file_path="test/path/file.mp3",
-        waveform_url="test/path/waveform.json"
+        waveform_url="test/path/waveform.json",
+        version_number=1
     )
     
     # Mock the storage client to raise connection error
     with patch("rehearsalhub.routers.versions.NextcloudClient") as mock_client_class:
         mock_client = MagicMock()
         mock_client.download = AsyncMock(side_effect=httpx.ConnectError("Connection failed"))
-        mock_client_class.return_value = mock_client
+        mock_client_class.for_member.return_value = mock_client
         
         # Mock the membership check
         with patch("rehearsalhub.routers.versions._get_version_and_assert_band_membership", 
-                  return_value=(mock_version, None)):
+                  return_value=(mock_version, mock_song)):
             
             from fastapi import HTTPException
             
@@ -131,7 +141,7 @@ async def test_get_waveform_connection_error():
             
             # Should return 503 Service Unavailable
             assert exc_info.value.status_code == 503
-            assert "Failed to connect to storage" in str(exc_info.value.detail)
+            assert "Storage service unavailable" in str(exc_info.value.detail)
 
 
 @pytest.mark.asyncio
@@ -140,24 +150,27 @@ async def test_stream_version_success():
     """Test successful streaming when connection works."""
     # Mock dependencies
     mock_session = MagicMock()
-    mock_member = Member(id=1, name="Test User")
+    mock_member = Member(id=uuid.uuid4())
     
-    # Mock version with nc_file_path
+    # Mock song and version
+    mock_song = Song(id=uuid.uuid4(), band_id=uuid.uuid4())
     mock_version = AudioVersion(
         id="test-version-id",
+        song_id=mock_song.id,
         nc_file_path="test/path/file.mp3",
-        waveform_url="test/path/waveform.json"
+        waveform_url="test/path/waveform.json",
+        version_number=1
     )
     
     # Mock the storage client to return success
     with patch("rehearsalhub.routers.versions.NextcloudClient") as mock_client_class:
         mock_client = MagicMock()
         mock_client.download = AsyncMock(return_value=b"audio_data")
-        mock_client_class.return_value = mock_client
+        mock_client_class.for_member.return_value = mock_client
         
         # Mock the membership check
         with patch("rehearsalhub.routers.versions._get_version_and_assert_band_membership", 
-                  return_value=(mock_version, None)):
+                  return_value=(mock_version, mock_song)):
             
             result = await stream_version(
                 version_id="test-version-id",