Add source tracking and sync status fields to Content model; update services module

- Introduced new fields in the Content model for source tracking and sync status, including external references and optimization fields.
- Updated the services module to include new content generation and pipeline services for better organization and clarity.

backend/igny8_core/business/optimization/models.py

@@ -0,0 +1,77 @@
+"""
+Optimization Models
+Phase 4: Linker & Optimizer
+"""
+from django.db import models
+from django.core.validators import MinValueValidator
+from igny8_core.auth.models import AccountBaseModel
+from igny8_core.business.content.models import Content
+
+
+class OptimizationTask(AccountBaseModel):
+    """
+    Optimization Task model for tracking content optimization runs.
+    """
+    
+    STATUS_CHOICES = [
+        ('pending', 'Pending'),
+        ('running', 'Running'),
+        ('completed', 'Completed'),
+        ('failed', 'Failed'),
+    ]
+    
+    content = models.ForeignKey(
+        Content,
+        on_delete=models.CASCADE,
+        related_name='optimization_tasks',
+        help_text="The content being optimized"
+    )
+    
+    # Scores before and after optimization
+    scores_before = models.JSONField(default=dict, help_text="Optimization scores before")
+    scores_after = models.JSONField(default=dict, help_text="Optimization scores after")
+    
+    # Content before and after (for comparison)
+    html_before = models.TextField(blank=True, help_text="HTML content before optimization")
+    html_after = models.TextField(blank=True, help_text="HTML content after optimization")
+    
+    # Status
+    status = models.CharField(
+        max_length=20,
+        choices=STATUS_CHOICES,
+        default='pending',
+        db_index=True,
+        help_text="Optimization task status"
+    )
+    
+    # Credits used
+    credits_used = models.IntegerField(default=0, validators=[MinValueValidator(0)], help_text="Credits used for optimization")
+    
+    # Metadata
+    metadata = models.JSONField(default=dict, blank=True, help_text="Additional metadata")
+    
+    created_at = models.DateTimeField(auto_now_add=True)
+    updated_at = models.DateTimeField(auto_now=True)
+    
+    class Meta:
+        app_label = 'optimization'
+        db_table = 'igny8_optimization_tasks'
+        ordering = ['-created_at']
+        verbose_name = 'Optimization Task'
+        verbose_name_plural = 'Optimization Tasks'
+        indexes = [
+            models.Index(fields=['content', 'status']),
+            models.Index(fields=['account', 'status']),
+            models.Index(fields=['status', 'created_at']),
+        ]
+    
+    def save(self, *args, **kwargs):
+        """Automatically set account from content"""
+        if self.content:
+            self.account = self.content.account
+        super().save(*args, **kwargs)
+    
+    def __str__(self):
+        return f"Optimization for {self.content.title or 'Content'} ({self.get_status_display()})"
+
+