ST-3.1: Course tags system
- education.course_tags with slug, color, featured flag
- education.course_tag_assignments (M:N) with auto usage_count
- Seeds: 10 initial tags (forex, crypto, ICT, etc.)
ST-3.2: Drawing tools for charts
- Enum: trading.drawing_tool_type (18 types including ICT)
- trading.drawing_tools with JSONB points and styles
- trading.drawing_templates for reusable presets
ST-3.3: Complete agent_executions
- Added 10 columns: execution_time_ms, slippage, risk_score, etc.
- 5 new performance indexes
- Trigger for updated_at
ST-3.4: ML composite indexes
- 8 new composite/partial indexes for predictions
- Optimized for symbol+timeframe+date queries
- Partial indexes for high confidence and overlay display
New files: 7 DDL, 2 migrations, 1 seed
Modified: 3 existing DDL files
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
