Add comprehensive admin features and multi-system integration

- Add admin dashboard with sync controls and data browser
- Implement RMM, Auvik, and Addigy organization mappings
- Add chunked ticket sync with progress tracking
- Implement entity sync service with rate limiting
- Add analytics engine and performance optimizer
- Create data browser for all PSA entities
- Add navigation components and UI improvements
- Implement background processing and sync services
- Add comprehensive documentation and migration scripts
- Update configuration items with multi-system support
- Enhance contact management and purchase history
- Add issue type assignment and LLM analyzer
- Improve error handling and logging utilities

migrations/009_relax_configuration_items_constraints.sql

@@ -0,0 +1,18 @@
+-- Relax foreign key constraints for configuration_items sync
+-- This allows configuration items to be synced even when referenced contacts don't exist
+
+-- Make contact_id constraint deferrable and nullable
+ALTER TABLE configuration_items 
+  DROP CONSTRAINT IF EXISTS configuration_items_contact_id_fkey;
+
+-- Add back the constraint as deferrable with ON DELETE SET NULL
+ALTER TABLE configuration_items 
+  ADD CONSTRAINT configuration_items_contact_id_fkey 
+  FOREIGN KEY (contact_id) 
+  REFERENCES contacts(id) 
+  ON DELETE SET NULL 
+  DEFERRABLE INITIALLY DEFERRED;
+
+-- Ensure contact_id column is nullable
+ALTER TABLE configuration_items 
+  ALTER COLUMN contact_id DROP NOT NULL;