feat: add is_extended_promotional field to components

[VOVANQUOCBAO]

Summary

• Adds is_extended_promotional field (where preferred = 1 AND basic = 0) to BaseComponent interface
• Exposes field in /components/list and /api/search API responses
• Adds is_extended_promotional=true filter parameter to both routes
• Adds is_extended_promotional column to all derived component tables via setup-derived-tables.ts

Changes

• lib/db/derivedtables/component-base.ts: Added is_extended_promotional?: boolean to BaseComponent
• lib/db/derivedtables/setup-derived-tables.ts: Added is_extended_promotional column to base columns list, computed in batch processing
• routes/components/list.tsx: Added query param, filter logic, preferred to SELECT, and field to response
• routes/api/search.tsx: Added query param, filter logic, and field to response
• tests/routes/components/list.test.ts: 3 new tests for field presence, filtering, and consistency
• tests/routes/api/search.test.ts: 3 new tests for field presence, filtering, and consistency

Test plan

• is_extended_promotional present in all component API responses as a boolean
• is_extended_promotional=true filter returns only components where is_preferred=true AND is_basic=false
• is_extended_promotional is consistent with is_preferred && !is_basic across all returned components
• TypeScript type check passes (bun tsc --noEmit)
• Biome lint/format check passes

/claim #92