feat: Add Content Generation Engine v2 with quality scoring

Major improvements to AI content generation:

## New Components (app/services/ai/)
- PromptLibrary: YAML-based prompt templates with inheritance
- ContextEngine: Anti-repetition and best performers tracking
- ContentGeneratorV2: Enhanced generation with dynamic parameters
- PlatformAdapter: Platform-specific content adaptation
- ContentValidator: AI-powered quality scoring (0-100)

## Prompt Library (app/prompts/)
- 3 personalities: default, educational, promotional
- 5 templates: tip_tech, product_post, service_post, thread, response
- 4 platform configs: x, threads, instagram, facebook
- Few-shot examples by category: ia, productividad, seguridad

## Database Changes
- New table: content_memory (tracks generated content)
- New columns in posts: quality_score, score_breakdown, generation_attempts

## New API Endpoints (/api/v2/generate/)
- POST /generate - Generation with quality check
- POST /generate/batch - Batch generation
- POST /quality/evaluate - Evaluate content quality
- GET /templates, /personalities, /platforms - List configs

## Celery Tasks
- update_engagement_scores (every 6h)
- cleanup_old_memory (monthly)
- refresh_best_posts_yaml (weekly)

## Tests
- Comprehensive tests for all AI engine components

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

alembic/env.py

@@ -16,9 +16,13 @@ sys.path.insert(0, str(Path(__file__).parent.parent))
 
 from app.core.config import settings
 from app.core.database import Base
+# Import all models for autogenerate support
 from app.models import (
     User, Product, Service, TipTemplate,
-    Post, ContentCalendar, ImageTemplate, Interaction
+    Post, ContentCalendar, ImageTemplate, Interaction,
+    PostMetrics, AnalyticsReport, Lead, OdooSyncLog,
+    ABTest, ABTestVariant, RecycledPost, ThreadSeries, ThreadPost,
+    ContentMemory
 )
 
 # this is the Alembic Config object

alembic/versions/20260128_add_content_memory_and_quality.py

@@ -0,0 +1,100 @@
+"""Add content_memory table and quality columns to posts
+
+Revision ID: 20260128001
+Revises:
+Create Date: 2026-01-28
+
+This migration adds:
+1. New table 'content_memory' for tracking generated content
+2. New columns in 'posts' for quality scoring
+"""
+from alembic import op
+import sqlalchemy as sa
+from sqlalchemy.dialects import postgresql
+
+# revision identifiers, used by Alembic.
+revision = '20260128001'
+down_revision = None
+branch_labels = None
+depends_on = None
+
+
+def upgrade() -> None:
+    # === Create content_memory table ===
+    op.create_table(
+        'content_memory',
+        sa.Column('id', sa.Integer(), nullable=False),
+        sa.Column('post_id', sa.Integer(), nullable=False),
+
+        # Content analysis
+        sa.Column('topics', postgresql.ARRAY(sa.String()), nullable=True),
+        sa.Column('key_phrases', postgresql.ARRAY(sa.String()), nullable=True),
+        sa.Column('hook_type', sa.String(50), nullable=True),
+        sa.Column('content_summary', sa.Text(), nullable=True),
+        sa.Column('content_embedding', postgresql.JSON(), nullable=True),
+
+        # Engagement metrics
+        sa.Column('engagement_score', sa.Float(), nullable=True),
+        sa.Column('engagement_breakdown', postgresql.JSON(), nullable=True),
+        sa.Column('is_top_performer', sa.Boolean(), default=False),
+
+        # Quality score
+        sa.Column('quality_score', sa.Integer(), nullable=True),
+        sa.Column('quality_breakdown', postgresql.JSON(), nullable=True),
+
+        # Example usage tracking
+        sa.Column('times_used_as_example', sa.Integer(), default=0),
+        sa.Column('last_used_as_example', sa.DateTime(), nullable=True),
+
+        # Metadata
+        sa.Column('platform', sa.String(20), nullable=True),
+        sa.Column('content_type', sa.String(50), nullable=True),
+        sa.Column('personality_used', sa.String(50), nullable=True),
+        sa.Column('template_used', sa.String(50), nullable=True),
+
+        # Timestamps
+        sa.Column('created_at', sa.DateTime(), server_default=sa.text('now()'), nullable=True),
+        sa.Column('updated_at', sa.DateTime(), server_default=sa.text('now()'), nullable=True),
+
+        sa.PrimaryKeyConstraint('id'),
+        sa.ForeignKeyConstraint(['post_id'], ['posts.id'], ondelete='CASCADE'),
+    )
+
+    # Create indexes for content_memory
+    op.create_index('ix_content_memory_post_id', 'content_memory', ['post_id'], unique=True)
+    op.create_index('ix_content_memory_engagement_score', 'content_memory', ['engagement_score'])
+    op.create_index('ix_content_memory_is_top_performer', 'content_memory', ['is_top_performer'])
+    op.create_index('ix_content_memory_hook_type', 'content_memory', ['hook_type'])
+    op.create_index('ix_content_memory_platform', 'content_memory', ['platform'])
+    op.create_index('ix_content_memory_content_type', 'content_memory', ['content_type'])
+    op.create_index('ix_content_memory_created_at', 'content_memory', ['created_at'])
+
+    # === Add quality columns to posts table ===
+    op.add_column('posts', sa.Column('quality_score', sa.Integer(), nullable=True))
+    op.add_column('posts', sa.Column('score_breakdown', postgresql.JSON(), nullable=True))
+    op.add_column('posts', sa.Column('generation_attempts', sa.Integer(), server_default='1', nullable=True))
+
+    # Create index for quality_score
+    op.create_index('ix_posts_quality_score', 'posts', ['quality_score'])
+
+
+def downgrade() -> None:
+    # Remove indexes from posts
+    op.drop_index('ix_posts_quality_score', table_name='posts')
+
+    # Remove columns from posts
+    op.drop_column('posts', 'generation_attempts')
+    op.drop_column('posts', 'score_breakdown')
+    op.drop_column('posts', 'quality_score')
+
+    # Remove indexes from content_memory
+    op.drop_index('ix_content_memory_created_at', table_name='content_memory')
+    op.drop_index('ix_content_memory_content_type', table_name='content_memory')
+    op.drop_index('ix_content_memory_platform', table_name='content_memory')
+    op.drop_index('ix_content_memory_hook_type', table_name='content_memory')
+    op.drop_index('ix_content_memory_is_top_performer', table_name='content_memory')
+    op.drop_index('ix_content_memory_engagement_score', table_name='content_memory')
+    op.drop_index('ix_content_memory_post_id', table_name='content_memory')
+
+    # Drop content_memory table
+    op.drop_table('content_memory')