feat(src/projects): add indexes on Project.name and Project.created_at

Add database indexes for name and created_at fields to speed up filtering and ordering queries.

src/projects/models.py

@@ -31,6 +31,8 @@ class Project(models.Model):
         indexes = [
             models.Index(fields=["pinned_date"]),
             models.Index(fields=["start_date", "end_date"]),
+            models.Index(fields=["name"]),
+            models.Index(fields=["created_at"]),
         ]
 
     def pin(self):
@@ -124,6 +126,10 @@ class AutomationRule(models.Model):
         verbose_name = "Automation Rule"
         verbose_name_plural = "Automation Rules"
         ordering = ["-created_at"]
+        indexes = [
+            models.Index(fields=["project", "is_active", "trigger_event"]),
+            models.Index(fields=["created_at"]),
+        ]
 
     def __str__(self):
         return f"[{self.project.ticket_prefix}] {self.name}"