chore: record discovery scan results for issue #2

Automated scan of the php-mcp codebase identified 30 issues across:
- 12 missing test coverage gaps (services, tools)
- 4 refactoring opportunities (SQL parser, ToolResult DTO, PHPStan, Boot.php)
- 4 infrastructure chores (missing YAML configs, PHPStan setup, CI, streaming)
- 6 feature gaps (templates, schema tools, export, caching, history, validation)
- 3 security reviews required (suspicious query monitoring, ContentTools, commerce)
- 1 documentation gap

All issues created on forge.lthn.ai (issues #4–#34).
Roadmap summary at #34

Closes #2

Co-Authored-By: darbs-claude <developers@lethean.io>

docs/discovery-2026-02-21.md

@@ -0,0 +1,52 @@
+# Discovery Scan — 2026-02-21
+
+Automated discovery scan performed for issue #2.
+
+## Issues Created
+
+### Test Coverage (12 issues)
+- #4 — test: add tests for ToolRegistry service
+- #5 — test: add tests for AuditLogService
+- #6 — test: add tests for CircuitBreaker service
+- #7 — test: add tests for DataRedactor service
+- #8 — test: add tests for McpHealthService
+- #9 — test: add tests for McpMetricsService
+- #10 — test: add tests for McpWebhookDispatcher
+- #11 — test: add tests for OpenApiGenerator
+- #12 — test: add tests for ToolRateLimiter
+- #13 — test: add tests for AgentSessionService
+- #14 — test: add tests for AgentToolRegistry
+- #15 — test: add integration tests for QueryDatabase tool
+
+### Refactoring (4 issues)
+- #16 — refactor: extract SQL parser from regex to AST-based validation
+- #17 — refactor: standardise tool responses with ToolResult DTO
+- #18 — refactor: fix PHPStan level 5 type errors across services
+- #19 — refactor: extract McpToolsRegistering tool registration from McpAgentServerCommand
+
+### Infrastructure / Chores (4 issues)
+- #20 — chore: create missing ToolRegistry YAML server definition files
+- #21 — chore: add PHPStan and static analysis to dev dependencies
+- #22 — chore: add CI/CD security regression tests
+- #31 — chore: add query result streaming for large result sets
+
+### Features (6 issues)
+- #23 — feat: add query template system
+- #24 — feat: add schema exploration tools (ListTables, DescribeTable, ListIndexes)
+- #25 — feat: add data export tool (CSV, JSON)
+- #26 — feat: add query result caching
+- #32 — feat: add query history tracking per workspace
+- #33 — feat: add data validation tool for database quality checks
+
+### Security (3 issues)
+- #27 — security: add monitoring and alerting for suspicious query patterns
+- #28 — security: review ContentTools for injection and data exposure risks
+- #29 — security: review commerce tools for payment data exposure
+
+### Documentation (1 issue)
+- #30 — docs: add inline documentation for ContentTools and commerce tools
+
+### Roadmap (1 issue)
+- #34 — roadmap: php-mcp production readiness
+
+**Total: 31 issues created**