Query memory and Filament performance

Tasks.

• Task 1: DatabaseEngine SQLite vector search — lazy iteration5/5
• Task 2: HandleLicensesCommand listLicenses — lazy with eager load5/5
• Task 3: HasClosureTable rebuild — chunk processing4/4
• Task 4: User permissions — cache hot path3/3
• Task 5: DynamicContentsService cache warm-up4/4
• Task 6: CoreStatsWidget — lazy load and cache4/4
• Task 7: Verify Contents Resource eager loading3/3
• Task 8: Optional — ListModifications tab count cache3/3
• Final verification3/3