Implement database queue infrastructure

src/integrations/supabase/types.ts

@@ -2170,7 +2170,19 @@ export type Database = {
       }
     }
     Views: {
-      [_ in never]: never
+      moderation_sla_metrics: {
+        Row: {
+          avg_resolution_hours: number | null
+          avg_wait_hours: number | null
+          currently_locked: number | null
+          escalated_count: number | null
+          max_wait_hours: number | null
+          pending_count: number | null
+          reassigned_count: number | null
+          submission_type: string | null
+        }
+        Relationships: []
+      }
     }
     Functions: {
       calculate_submission_priority: {
@@ -2218,6 +2230,14 @@ export type Database = {
         Args: Record<PropertyKey, never>
         Returns: undefined
       }
+      extend_submission_lock: {
+        Args: {
+          extension_duration?: unknown
+          moderator_id: string
+          submission_id: string
+        }
+        Returns: string
+      }
       extract_cf_image_id: {
         Args: { url: string }
         Returns: string
@@ -2278,6 +2298,14 @@ export type Database = {
         Args: Record<PropertyKey, never>
         Returns: undefined
       }
+      release_expired_locks: {
+        Args: Record<PropertyKey, never>
+        Returns: number
+      }
+      release_submission_lock: {
+        Args: { moderator_id: string; submission_id: string }
+        Returns: boolean
+      }
       update_company_ratings: {
         Args: { target_company_id: string }
         Returns: undefined