P12-T2: Add Tool Parameter Frequency Analysis

[SoundBlaster]

Description

Adds opt-in tool parameter frequency analysis to the XcodeMCPWrapper Web UI. When capture_params: true is set in the metrics config, the wrapper records the sorted key names (never values) of each tool call's arguments object. A new API endpoint and expandable dashboard UI show the most common parameter key combinations per tool.

Key changes:

• WebUIConfig: new capture_params flag (default False)
• MetricsCollector: record_param_keys() / get_param_patterns() with in-memory dict storage
• SharedMetricsStore: new param_patterns SQLite table with UPSERT; record_param_keys() / get_param_patterns()
• server.py: new GET /api/analytics/param-patterns?tool=<name>&top_n=10 endpoint
• __main__.py: extracts argument keys from MCPRequest.params.arguments when flag enabled
• dashboard.js: expandable chevron rows in the Per-Tool Latency table; fetches patterns on demand
• dashboard.css: styles for toggle button and param patterns sub-table
• Follow-up task FU-P12-T2-1 added to workplan: fix stacking click listeners in updateLatencyTable

Type of Change

• New feature

Quality Gates

• make test - All tests pass with ≥90% coverage (457 passed, 95.95% coverage)
• make lint - No linting errors (ruff check src/ clean)
• make format - Code is properly formatted
• make typecheck - Type checking passes (mypy src/ clean, 13 files)
• make doccheck - Documentation is synced with DocC (if docs changed)

Documentation Sync

• Documentation changes are synced with DocC catalog (or N/A) — no docs/ files changed

Testing

• Added/updated tests for new functionality
  • 8 tests: TestParamPatterns in test_metrics.py
  • 6 tests: param pattern methods in test_shared_metrics.py
  • 4 tests: TestParamPatternsEndpoint in test_server.py
  • 2 tests: capture_params config flag in test_config.py
• All tests pass locally
• Manually tested the changes

Checklist

• Code follows the project's style guidelines
• Self-review completed
• Comments added for complex code
• Documentation updated (if needed)
• No new warnings generated
• PR title is descriptive