Remove API pagination and fix contractor UI issues

- Remove pagination from all Django REST Framework endpoints
- Update Kotlin API clients to return direct lists instead of paginated responses
- Update iOS ViewModels to handle direct list responses
- Remove ContractorListResponse, DocumentListResponse, and PaginatedResponse models
- Fix contractor form specialty selector loading with improved DataCache access
- Fix contractor sheet presentation to use full screen (.presentationDetents([.large]))
- Improve UI test scrolling to handle lists of any size with smart end detection

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

composeApp/src/commonMain/kotlin/com/example/mycrib/cache/DataPrefetchManager.kt

@@ -154,8 +154,8 @@ class DataPrefetchManager {
                 search = null
             )
             if (result is ApiResult.Success) {
-                DataCache.updateDocuments(result.data.results)
-                println("DataPrefetchManager: Cached ${result.data.results.size} documents")
+                DataCache.updateDocuments(result.data)
+                println("DataPrefetchManager: Cached ${result.data.size} documents")
             }
         } catch (e: Exception) {
             println("DataPrefetchManager: Error fetching documents: ${e.message}")
@@ -173,9 +173,9 @@ class DataPrefetchManager {
                 search = null
             )
             if (result is ApiResult.Success) {
-                // ContractorListResponse.results is List<ContractorSummary>, not List<Contractor>
+                // API returns List<ContractorSummary>, not List<Contractor>
                 // Skip caching for now - full Contractor objects will be cached when fetched individually
-                println("DataPrefetchManager: Fetched ${result.data.results.size} contractor summaries")
+                println("DataPrefetchManager: Fetched ${result.data.size} contractor summaries")
             }
         } catch (e: Exception) {
             println("DataPrefetchManager: Error fetching contractors: ${e.message}")