feat: Add Analytics, Odoo Integration, A/B Testing, and Content features

Phase 1 - Analytics y Reportes:
- PostMetrics and AnalyticsReport models for tracking engagement
- Analytics service with dashboard stats, top posts, optimal times
- 8 API endpoints at /api/analytics/*
- Interactive dashboard with Chart.js charts
- Celery tasks for metrics fetch (15min) and weekly reports

Phase 2 - Integración Odoo:
- Lead and OdooSyncLog models for CRM integration
- Odoo fields added to Product and Service models
- XML-RPC service for bidirectional sync
- Lead management API at /api/leads/*
- Leads dashboard template
- Celery tasks for product/service sync and lead export

Phase 3 - A/B Testing y Recycling:
- ABTest, ABTestVariant, RecycledPost models
- Statistical winner analysis using chi-square test
- Content recycling with engagement-based scoring
- APIs at /api/ab-tests/* and /api/recycling/*
- Automated test evaluation and content recycling tasks

Phase 4 - Thread Series y Templates:
- ThreadSeries and ThreadPost models for multi-post threads
- AI-powered thread generation
- Enhanced ImageTemplate with HTML template support
- APIs at /api/threads/* and /api/templates/*
- Thread scheduling with reply chain support

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

app/models/__init__.py

@@ -12,6 +12,13 @@ from app.models.post import Post
 from app.models.content_calendar import ContentCalendar
 from app.models.image_template import ImageTemplate
 from app.models.interaction import Interaction
+from app.models.post_metrics import PostMetrics
+from app.models.analytics_report import AnalyticsReport
+from app.models.lead import Lead
+from app.models.odoo_sync_log import OdooSyncLog
+from app.models.ab_test import ABTest, ABTestVariant
+from app.models.recycled_post import RecycledPost
+from app.models.thread_series import ThreadSeries, ThreadPost
 
 __all__ = [
     "Base",
@@ -22,5 +29,14 @@ __all__ = [
     "Post",
     "ContentCalendar",
     "ImageTemplate",
-    "Interaction"
+    "Interaction",
+    "PostMetrics",
+    "AnalyticsReport",
+    "Lead",
+    "OdooSyncLog",
+    "ABTest",
+    "ABTestVariant",
+    "RecycledPost",
+    "ThreadSeries",
+    "ThreadPost"
 ]