Fix test compilation errors: add context.Background() to sqlite.New() calls

Updated all test files to pass context.Background() as the first parameter
to sqlite.New() calls to match the updated function signature.

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

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

internal/beads/routing_integration_test.go

@@ -142,7 +142,7 @@ func TestMultiRepoEndToEnd(t *testing.T) {
 
 	// Initialize database
 	dbPath := filepath.Join(beadsDir, "beads.db")
-	store, err := sqlite.New(dbPath)
+	store, err := sqlite.New(context.Background(), dbPath)
 	if err != nil {
 		t.Fatalf("failed to create storage: %v", err)
 	}