feat: add unified code quality dashboard with multiple validators

- Add validator_type field to scans and violations (architecture,
  security, performance)
- Create security validator with SEC-xxx rules
- Create performance validator with PERF-xxx rules
- Add base validator class for shared functionality
- Add validate_all.py script to run all validators
- Update code quality service with validator type filtering
- Add validator type tabs to dashboard UI
- Add validator type filter to violations list
- Update stats response with per-validator breakdown
- Add security and performance rules documentation
- Add chat-bubble icons to icon library

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

models/schema/stats.py

@@ -243,15 +243,29 @@ class VendorAnalyticsResponse(BaseModel):
 # ============================================================================
 
 
+class ValidatorStats(BaseModel):
+    """Statistics for a single validator type."""
+
+    total_violations: int = 0
+    errors: int = 0
+    warnings: int = 0
+    last_scan: str | None = None
+
+
 class CodeQualityDashboardStatsResponse(BaseModel):
     """Code quality dashboard statistics response schema.
 
     Used by: GET /api/v1/admin/code-quality/stats
+
+    Supports multiple validator types: architecture, security, performance.
+    When validator_type is specified, returns stats for that type only.
+    When not specified, returns combined stats with per-validator breakdown.
     """
 
     total_violations: int
     errors: int
     warnings: int
+    info: int = 0
     open: int
     assigned: int
     resolved: int
@@ -263,6 +277,11 @@ class CodeQualityDashboardStatsResponse(BaseModel):
     by_module: dict[str, Any] = Field(default_factory=dict)
     top_files: list[dict[str, Any]] = Field(default_factory=list)
     last_scan: str | None = None
+    validator_type: str | None = None  # Set when filtering by type
+    by_validator: dict[str, ValidatorStats] = Field(
+        default_factory=dict,
+        description="Per-validator breakdown (architecture, security, performance)",
+    )
 
 
 # ============================================================================