feat: postgresql migration and removal of sqlite in pytest (#546)

* feat: remove support of sqlite, 100% postgres

* fix: more migration and make datetime timezone aware in postgres

* fix: change how database is get, and use contextvar to have difference instance between different loops

* test: properly use client fixture that handle lifetime/database connection

* fix: add missing client fixture parameters to test functions

This commit fixes NameError issues where test functions were trying to use
the 'client' fixture but didn't have it as a parameter. The changes include:

1. Added 'client' parameter to test functions in:
   - test_transcripts_audio_download.py (6 functions including fixture)
   - test_transcripts_speaker.py (3 functions)
   - test_transcripts_upload.py (1 function)
   - test_transcripts_rtc_ws.py (2 functions + appserver fixture)

2. Resolved naming conflicts in test_transcripts_rtc_ws.py where both HTTP
   client and StreamClient were using variable name 'client'. StreamClient
   instances are now named 'stream_client' to avoid conflicts.

3. Added missing 'from reflector.app import app' import in rtc_ws tests.

Background: Previously implemented contextvars solution with get_database()
function resolves asyncio event loop conflicts in Celery tasks. The global
client fixture was also created to replace manual AsyncClient instances,
ensuring proper FastAPI application lifecycle management and database
connections during tests.

All tests now pass except for 2 pre-existing RTC WebSocket test failures
related to asyncpg connection issues unrelated to these fixes.

* fix: ensure task are correctly closed

* fix: make separate event loop for the live server

* fix: make default settings pointing at postgres

* build: remove pytest-docker deps out of dev, just tests group

server/tests/test_search.py

@@ -1,82 +1,62 @@
 """Tests for full-text search functionality."""
 
 import json
-from datetime import datetime
+from datetime import datetime, timezone
 
 import pytest
 from pydantic import ValidationError
 
-from reflector.db import database
+from reflector.db import get_database
 from reflector.db.search import SearchParameters, search_controller
 from reflector.db.transcripts import transcripts
-from reflector.db.utils import is_postgresql
 
 
 @pytest.mark.asyncio
 async def test_search_postgresql_only():
-    await database.connect()
+    params = SearchParameters(query_text="any query here")
+    results, total = await search_controller.search_transcripts(params)
+    assert results == []
+    assert total == 0
 
     try:
-        params = SearchParameters(query_text="any query here")
-        results, total = await search_controller.search_transcripts(params)
-        assert results == []
-        assert total == 0
+        SearchParameters(query_text="")
+        assert False, "Should have raised validation error"
+    except ValidationError:
+        pass  # Expected
 
-        try:
-            SearchParameters(query_text="")
-            assert False, "Should have raised validation error"
-        except ValidationError:
-            pass  # Expected
-
-        # Test that whitespace query raises validation error
-        try:
-            SearchParameters(query_text="   ")
-            assert False, "Should have raised validation error"
-        except ValidationError:
-            pass  # Expected
-
-    finally:
-        await database.disconnect()
+    # Test that whitespace query raises validation error
+    try:
+        SearchParameters(query_text="   ")
+        assert False, "Should have raised validation error"
+    except ValidationError:
+        pass  # Expected
 
 
 @pytest.mark.asyncio
 async def test_search_input_validation():
-    await database.connect()
-
     try:
-        try:
-            SearchParameters(query_text="")
-            assert False, "Should have raised ValidationError"
-        except ValidationError:
-            pass  # Expected
+        SearchParameters(query_text="")
+        assert False, "Should have raised ValidationError"
+    except ValidationError:
+        pass  # Expected
 
-        # Test that whitespace query raises validation error
-        try:
-            SearchParameters(query_text="   \t\n  ")
-            assert False, "Should have raised ValidationError"
-        except ValidationError:
-            pass  # Expected
-    finally:
-        await database.disconnect()
+    # Test that whitespace query raises validation error
+    try:
+        SearchParameters(query_text="   \t\n  ")
+        assert False, "Should have raised ValidationError"
+    except ValidationError:
+        pass  # Expected
 
 
 @pytest.mark.asyncio
 async def test_postgresql_search_with_data():
-    """Test full-text search with actual data in PostgreSQL.
-
-    Example how to run: DATABASE_URL=postgresql://reflector:reflector@localhost:5432/reflector_test uv run pytest tests/test_search.py::test_postgresql_search_with_data -v -p no:env
-    """
-    # Skip if not PostgreSQL
-    if not is_postgresql():
-        pytest.skip("Test requires PostgreSQL. Set DATABASE_URL=postgresql://...")
-
-    await database.connect()
-
     # collision is improbable
     test_id = "test-search-e2e-7f3a9b2c"
 
     try:
-        await database.execute(transcripts.delete().where(transcripts.c.id == test_id))
+        await get_database().execute(
+            transcripts.delete().where(transcripts.c.id == test_id)
+        )
 
         test_data = {
             "id": test_id,
@@ -85,7 +65,7 @@ async def test_postgresql_search_with_data():
             "status": "completed",
             "locked": False,
             "duration": 1800.0,
-            "created_at": datetime.now(),
+            "created_at": datetime.now(timezone.utc),
             "short_summary": "Team discussed search implementation",
             "long_summary": "The engineering team met to plan the search feature",
             "topics": json.dumps([]),
@@ -112,7 +92,7 @@ The search feature should support complex queries with ranking.
 We need to implement PostgreSQL tsvector for better performance.""",
         }
 
-        await database.execute(transcripts.insert().values(**test_data))
+        await get_database().execute(transcripts.insert().values(**test_data))
 
         # Test 1: Search for a word in title
         params = SearchParameters(query_text="planning")
@@ -141,7 +121,6 @@ We need to implement PostgreSQL tsvector for better performance.""",
             assert test_result.title == "Engineering Planning Meeting Q4 2024"
             assert test_result.status == "completed"
             assert test_result.duration == 1800.0
-            assert test_result.source_kind == "room"
             assert 0 <= test_result.rank <= 1, "Rank should be normalized to 0-1"
 
         # Test 5: Search with OR operator
@@ -159,5 +138,7 @@ We need to implement PostgreSQL tsvector for better performance.""",
         assert found, "Should find test transcript by exact phrase"
 
     finally:
-        await database.execute(transcripts.delete().where(transcripts.c.id == test_id))
-        await database.disconnect()
+        await get_database().execute(
+            transcripts.delete().where(transcripts.c.id == test_id)
+        )
+        await get_database().disconnect()