feat(error-handling): Implement comprehensive gateway error handling with user-friendly messages

- Add comprehensive gateway error handler with friendly user messages
- Handle subscription status errors (inactive BYOK, subscription required)
- Handle authentication errors (invalid API keys, missing tokens)
- Handle rate limiting with retry suggestions
- Handle model availability and validation errors
- Handle network connectivity issues
- Provide actionable solutions for each error type
- Prevent duplicate error messages by returning early after showing friendly error
- Fix telemetry tests to use correct environment variable names (TASKMASTER_API_KEY)
- Fix config manager getUserId function to properly save default userId to file
- All tests now passing (34 test suites, 360 tests)

tasks/tasks.json

@@ -6333,35 +6333,6 @@
           "status": "pending"
         }
       ]
-    },
-    {
-      "id": 96,
-      "title": "Create Test Task Generation and Validation System",
-      "description": "Implement a system for generating test tasks with proper validation, structure, and integration with the existing task management framework.",
-      "details": "Build a comprehensive test task generation system that includes:\n\n1. Test Task Template System:\n   - Create standardized templates for different types of test tasks (unit, integration, e2e)\n   - Implement template variables for dynamic content generation\n   - Support for test-specific metadata (test type, coverage areas, execution time)\n\n2. Test Task Validation:\n   - Validate test task structure against schema requirements\n   - Ensure test tasks have proper dependencies on implementation tasks\n   - Verify test strategy completeness and specificity\n   - Check for required test metadata fields\n\n3. Integration with Task Management:\n   - Extend existing task creation commands to support test task generation\n   - Add test task filtering and categorization in list commands\n   - Implement test task execution tracking and results storage\n   - Support for test task hierarchies and grouping\n\n4. Test Task Automation:\n   - Auto-generate test tasks when implementation tasks are created\n   - Implement test task dependency resolution based on implementation dependencies\n   - Add support for test task scheduling and execution workflows\n   - Create test task reporting and metrics collection\n\n5. CLI Integration:\n   - Add 'create-test-task' command with options for test type and target functionality\n   - Implement test task status tracking (pending, running, passed, failed)\n   - Add test task execution commands with result reporting\n   - Support for bulk test task operations",
-      "testStrategy": "Verify the test task generation system by:\n\n1. Template Validation:\n   - Create test tasks using each template type and verify proper structure\n   - Test template variable substitution with various input scenarios\n   - Validate generated test tasks against the task schema\n\n2. Integration Testing:\n   - Test creation of test tasks through CLI commands\n   - Verify test task filtering and listing functionality\n   - Test dependency resolution between test tasks and implementation tasks\n   - Validate test task execution workflow end-to-end\n\n3. Validation Testing:\n   - Test validation rules with valid and invalid test task structures\n   - Verify error handling for malformed test tasks\n   - Test schema compliance for all generated test tasks\n\n4. Automation Testing:\n   - Test auto-generation of test tasks when implementation tasks are created\n   - Verify dependency propagation from implementation to test tasks\n   - Test bulk operations on multiple test tasks\n\n5. CLI Testing:\n   - Test all new CLI commands with various parameter combinations\n   - Verify proper error messages and help documentation\n   - Test JSON output format for programmatic usage\n   - Validate test task status tracking and reporting functionality",
-      "status": "pending",
-      "dependencies": [
-        1,
-        3,
-        22
-      ],
-      "priority": "medium",
-      "subtasks": []
-    },
-    {
-      "id": 97,
-      "title": "Implement Test Task Execution and Reporting Framework",
-      "description": "Create a comprehensive framework for executing test tasks and generating detailed reports on test results, coverage, and performance metrics.",
-      "details": "Build a robust test execution and reporting system that integrates with the existing test task generation framework:\n\n1. Test Execution Engine:\n   - Implement a test runner that can execute different types of test tasks (unit, integration, e2e)\n   - Support parallel and sequential test execution modes\n   - Handle test timeouts and resource management\n   - Provide real-time progress updates during test execution\n   - Support test filtering by tags, priority, or test type\n\n2. Test Result Collection:\n   - Capture test outcomes (pass/fail/skip) with detailed error messages\n   - Record execution times and performance metrics\n   - Collect code coverage data when applicable\n   - Track test dependencies and execution order\n   - Store test artifacts (logs, screenshots, generated files)\n\n3. Reporting System:\n   - Generate comprehensive HTML reports with interactive charts\n   - Create JSON output for CI/CD integration\n   - Implement console reporting with color-coded results\n   - Support custom report templates and formats\n   - Include trend analysis for test performance over time\n\n4. Integration Features:\n   - Connect with existing task management system to update task statuses\n   - Support CI/CD pipeline integration with exit codes\n   - Implement webhook notifications for test completion\n   - Provide API endpoints for external tool integration\n\n5. Configuration Management:\n   - Allow customizable test execution settings\n   - Support environment-specific test configurations\n   - Implement test suite organization and grouping\n   - Enable selective test execution based on criteria",
-      "testStrategy": "Verify the test execution framework through comprehensive validation:\n\n1. Unit Testing:\n   - Test the test runner engine with mock test cases\n   - Validate result collection accuracy with known outcomes\n   - Test report generation with various data scenarios\n   - Verify configuration parsing and validation\n\n2. Integration Testing:\n   - Execute real test suites and verify accurate result capture\n   - Test parallel execution with multiple test types\n   - Validate report generation with actual test data\n   - Test integration with task management system updates\n\n3. Performance Testing:\n   - Measure execution overhead and resource usage\n   - Test with large test suites to verify scalability\n   - Validate timeout handling and resource cleanup\n   - Test concurrent execution limits and stability\n\n4. End-to-End Validation:\n   - Run complete test cycles from execution to reporting\n   - Verify CI/CD integration with sample pipelines\n   - Test webhook notifications and external integrations\n   - Validate report accuracy against manual test execution\n\n5. Error Handling:\n   - Test behavior with failing tests and system errors\n   - Verify graceful handling of resource constraints\n   - Test recovery from interrupted test executions\n   - Validate error reporting and logging accuracy",
-      "status": "pending",
-      "dependencies": [
-        96,
-        22
-      ],
-      "priority": "medium",
-      "subtasks": []
     }
   ]
 }