fix: move lexical declarations outside case blocks in AbsurdSqlDatabaseService

- Move queryResult and allResult declarations outside switch statement
- Change const declarations to let since they're now in outer scope
- Remove const declarations from inside case blocks

This fixes the 'no-case-declarations' linter errors by ensuring variables
are declared in a scope that encompasses all case blocks, preventing
potential scoping issues.

Note: Type definition errors for external modules remain and should be
addressed separately.

src/services/PlatformService.ts

@@ -115,5 +115,8 @@ export interface PlatformService {
    * @param params - The parameters to pass to the statement
    * @returns Promise resolving to the result of the statement
    */
-  dbExec(sql: string, params?: unknown[]): Promise<{ changes: number; lastId?: number }>;
+  dbExec(
+    sql: string,
+    params?: unknown[],
+  ): Promise<{ changes: number; lastId?: number }>;
 }