refactor: единый источник категории LOT — local_pricelist_items.lot_category

Удалён мёртвый серверный слой управления компонентами/категориями,
который дублировал источники категории LOT. В рантайме категория всегда
берётся из local_pricelist_items.lot_category (наполняется синком из
qt_pricelist_items.lot_category).

Удалено:
- repository: UnifiedRepo/DataSource, ComponentRepository, CategoryRepository
- services: старый ConfigurationService (заменён LocalConfigurationService),
  ComponentService, ComponentToLocal, ImportFromLot, ParsePartNumber
- quote.go: недостижимый online-блок (qt_categories) + componentRepo/
  pricingService/priceResolver

Сохранены живые типы: models.Category/DefaultCategories (для /api/categories),
ComponentView/ComponentListResult, CreateConfigRequest/ArticlePreviewRequest/
ConfigurationGetter/ErrConfig*.

bible-local/03-database.md: зафиксирован единственный источник категории LOT;
qt_categories/qt_lot_metadata перенесены в server-side only.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

bible-local/03-database.md

@@ -25,6 +25,7 @@ Rules:
 - cache tables may be rebuilt if local migration recovery requires it;
 - user-authored tables must not be dropped as a recovery shortcut;
 - `local_pricelist_items` is the only valid runtime source of prices and component catalog; do not add a separate component cache table;
+- `local_pricelist_items.lot_category` is the single source of a LOT's category at runtime (populated by sync from `qt_pricelist_items.lot_category`); do not derive category from a lot_name prefix or from `qt_categories`/`qt_lot_metadata`;
 - configuration `items` and `vendor_spec` are stored as JSON payloads inside configuration rows;
 - `local_components` table has been removed; any reference to it is dead code.
 
@@ -35,8 +36,6 @@ MariaDB is the central sync database (`RFQ_LOG`). Final schema as of 2026-04-15.
 ### QuoteForge tables (qt_*)
 
 Runtime read:
-- `qt_categories` — pricelist categories (note: `name`/`name_ru` columns being removed; QF does not use them)
-- `qt_lot_metadata` — component metadata, price settings
 - `qt_pricelists` — pricelist headers (source: estimate / warehouse / competitor)
 - `qt_pricelist_items` — pricelist rows
 - `qt_partnumber_books` — partnumber book headers
@@ -53,6 +52,8 @@ Insert-only tracking:
 - `qt_vendor_partnumber_seen` — vendor partnumbers encountered during sync; `lot_suggestion` column updated when user manually maps PN → LOT in vendor-spec UI
 
 Server-side only (not queried by client runtime):
+- `qt_categories` — pricelist category registry; QF runtime serves category lists for the UI from `models.DefaultCategories` (Go) overlaid with categories present in `local_pricelist_items`, not from this table. `name`/`name_ru` columns being removed.
+- `qt_lot_metadata` — component metadata / price settings; the Go server-side component/category management layer (`ComponentRepository`, `CategoryRepository`, `ComponentService`) was removed — no client code reads this table
 - `qt_component_usage_stats` — aggregated component popularity stats (written by server jobs)
 - `qt_pricing_alerts` — price anomaly alerts (models exist in Go; feature disabled in runtime)
 - `qt_schema_migrations` — server migration history (applied via `go run ./cmd/qfs -migrate`)