Apply database hardening migrations

Approve and apply the latest set of database migrations for Phase 4: Application Boundary Hardening. These migrations include orphan image cleanup, slug validation triggers, monitoring and alerting infrastructure, and scheduled maintenance functions.

src/integrations/supabase/types.ts

@@ -1997,6 +1997,30 @@ export type Database = {
         }
         Relationships: []
       }
+      orphaned_images: {
+        Row: {
+          cloudflare_id: string
+          created_at: string
+          id: string
+          image_url: string
+          marked_for_deletion_at: string | null
+        }
+        Insert: {
+          cloudflare_id: string
+          created_at?: string
+          id?: string
+          image_url: string
+          marked_for_deletion_at?: string | null
+        }
+        Update: {
+          cloudflare_id?: string
+          created_at?: string
+          id?: string
+          image_url?: string
+          marked_for_deletion_at?: string | null
+        }
+        Relationships: []
+      }
       orphaned_images_log: {
         Row: {
           cleaned_up: boolean | null
@@ -5304,6 +5328,36 @@ export type Database = {
           },
         ]
       }
+      system_alerts: {
+        Row: {
+          alert_type: string
+          created_at: string
+          id: string
+          message: string
+          metadata: Json | null
+          resolved_at: string | null
+          severity: string
+        }
+        Insert: {
+          alert_type: string
+          created_at?: string
+          id?: string
+          message: string
+          metadata?: Json | null
+          resolved_at?: string | null
+          severity: string
+        }
+        Update: {
+          alert_type?: string
+          created_at?: string
+          id?: string
+          message?: string
+          metadata?: Json | null
+          resolved_at?: string | null
+          severity?: string
+        }
+        Relationships: []
+      }
       test_data_registry: {
         Row: {
           created_at: string
@@ -5935,6 +5989,15 @@ export type Database = {
         }
         Relationships: []
       }
+      system_health: {
+        Row: {
+          alerts_last_24h: number | null
+          checked_at: string | null
+          critical_alerts_count: number | null
+          orphaned_images_count: number | null
+        }
+        Relationships: []
+      }
     }
     Functions: {
       anonymize_user_submissions: {
@@ -6041,6 +6104,15 @@ export type Database = {
             }
             Returns: string
           }
+      create_system_alert: {
+        Args: {
+          p_alert_type: string
+          p_message: string
+          p_metadata?: Json
+          p_severity: string
+        }
+        Returns: string
+      }
       delete_entity_from_submission: {
         Args: {
           p_deleted_by: string
@@ -6195,7 +6267,7 @@ export type Database = {
       is_auth0_user: { Args: never; Returns: boolean }
       is_moderator: { Args: { _user_id: string }; Returns: boolean }
       is_superuser: { Args: { _user_id: string }; Returns: boolean }
-      is_user_banned: { Args: { _user_id: string }; Returns: boolean }
+      is_user_banned: { Args: { p_user_id: string }; Returns: boolean }
       log_admin_action: {
         Args: {
           _action: string
@@ -6239,6 +6311,7 @@ export type Database = {
         }
         Returns: undefined
       }
+      mark_orphaned_images: { Args: never; Returns: undefined }
       migrate_ride_technical_data: { Args: never; Returns: undefined }
       migrate_user_list_items: { Args: never; Returns: undefined }
       process_approval_transaction: {
@@ -6276,6 +6349,14 @@ export type Database = {
         }
         Returns: string
       }
+      run_system_maintenance: {
+        Args: never
+        Returns: {
+          details: Json
+          status: string
+          task: string
+        }[]
+      }
       set_config_value: {
         Args: {
           is_local?: boolean