fix(tests): add db fixture to rotation edge case tests

Tests that use mark_rate_limited now need a database initialized
since the method persists rate limits to SQLite.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <[email protected]>

Author: joachimBrindeau

tests/unit/rotation/test_rotation_edge_cases.py

@@ -10,6 +10,7 @@
 
 import pytest
 
+from claude_code_proxy.db import init_db
 from claude_code_proxy.rotation.pool import AccountState, RotationPool
 
 
@@ -41,6 +42,14 @@ def temp_accounts_file(tmp_path: Path) -> Path:
     return accounts_path
 
 
+@pytest.fixture
+async def db_path(tmp_path: Path) -> Path:
+    """Initialize a temporary test database."""
+    db_file = tmp_path / "test.db"
+    await init_db(db_file)
+    return db_file
+
+
 @pytest.mark.unit
 @pytest.mark.asyncio
 async def test_concurrent_account_selection(temp_accounts_file: Path) -> None:
@@ -81,7 +90,9 @@ async def test_concurrent_account_selection(temp_accounts_file: Path) -> None:
 
 @pytest.mark.unit
 @pytest.mark.asyncio
-async def test_file_reload_during_active_requests(temp_accounts_file: Path) -> None:
+async def test_file_reload_during_active_requests(
+    temp_accounts_file: Path, db_path: Path
+) -> None:
     """Test that file reload preserves state during active requests.
 
     Verifies:
@@ -149,7 +160,9 @@ async def test_token_refresh_during_failover(temp_accounts_file: Path) -> None:
 
 @pytest.mark.unit
 @pytest.mark.asyncio
-async def test_all_accounts_rate_limited_recovery(temp_accounts_file: Path) -> None:
+async def test_all_accounts_rate_limited_recovery(
+    temp_accounts_file: Path, db_path: Path
+) -> None:
     """Test recovery when all accounts become rate limited.
 
     Verifies: