test(ipuaro): improve test coverage to 92% branches

- Raise branch coverage threshold from 90% to 92%
- Add 21 new edge-case tests across modules
- Watchdog: add tests for error handling, flushAll, polling mode
- OllamaClient: add tests for AbortError and model not found
- GetLinesTool: add tests for filesystem fallback, undefined params
- GetClassTool: add tests for undefined extends, error handling
- GetFunctionTool: add tests for error handling, undefined returnType

Coverage results:
- Lines: 97.83% (threshold 95%)
- Branches: 92.01% (threshold 92%)
- Functions: 99.16% (threshold 95%)
- Statements: 97.83% (threshold 95%)
- Total tests: 1441 (all passing)

packages/ipuaro/vitest.config.ts

@@ -20,7 +20,7 @@ export default defineConfig({
             thresholds: {
                 lines: 95,
                 functions: 95,
-                branches: 90,
+                branches: 92,
                 statements: 95,
             },
         },