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/content/models.py

@@ -115,6 +115,47 @@ class Content(SiteSectorBaseModel):
     generated_at = models.DateTimeField(auto_now_add=True)
     updated_at = models.DateTimeField(auto_now=True)
     
+    # Phase 4: Source tracking
+    SOURCE_CHOICES = [
+        ('igny8', 'IGNY8 Generated'),
+        ('wordpress', 'WordPress Synced'),
+        ('shopify', 'Shopify Synced'),
+        ('custom', 'Custom API Synced'),
+    ]
+    source = models.CharField(
+        max_length=50,
+        choices=SOURCE_CHOICES,
+        default='igny8',
+        db_index=True,
+        help_text="Source of the content"
+    )
+    
+    SYNC_STATUS_CHOICES = [
+        ('native', 'Native IGNY8 Content'),
+        ('imported', 'Imported from External'),
+        ('synced', 'Synced from External'),
+    ]
+    sync_status = models.CharField(
+        max_length=50,
+        choices=SYNC_STATUS_CHOICES,
+        default='native',
+        db_index=True,
+        help_text="Sync status of the content"
+    )
+    
+    # External reference fields
+    external_id = models.CharField(max_length=255, blank=True, null=True, help_text="External platform ID")
+    external_url = models.URLField(blank=True, null=True, help_text="External platform URL")
+    sync_metadata = models.JSONField(default=dict, blank=True, help_text="Platform-specific sync metadata")
+    
+    # Phase 4: Linking fields
+    internal_links = models.JSONField(default=list, blank=True, help_text="Internal links added by linker")
+    linker_version = models.IntegerField(default=0, help_text="Version of linker processing")
+    
+    # Phase 4: Optimization fields
+    optimizer_version = models.IntegerField(default=0, help_text="Version of optimizer processing")
+    optimization_scores = models.JSONField(default=dict, blank=True, help_text="Optimization scores (SEO, readability, engagement)")
+    
     class Meta:
         app_label = 'writer'
         db_table = 'igny8_content'
@@ -124,6 +165,9 @@ class Content(SiteSectorBaseModel):
         indexes = [
             models.Index(fields=['task']),
             models.Index(fields=['generated_at']),
+            models.Index(fields=['source']),
+            models.Index(fields=['sync_status']),
+            models.Index(fields=['source', 'sync_status']),
         ]
     
     def save(self, *args, **kwargs):