refactor: привести кодовую базу в соответствие с канонами bible

- 400 → 422 для всех ошибок валидации входных данных (handlers: export, quote, sync, vendor_spec, partnumber_books, pricelist)
- SQL-запросы вынесены из handlers в localdb (partnumber_books, pricelist, support_bundle); ValidateMariaDBConnection перенесён в internal/db/validate.go
- List-ответы унифицированы: ключ items, поля total_count/page/per_page/total_pages (component, pricelist, partnumber_books); шаблоны обновлены
- Молчаливые ошибки заменены на slog.Warn/Error (support_bundle, vendor_spec, component, configuration, local_configuration, localdb)
- N+1 запросы устранены: batch-запросы в export.go и vendor_workspace_import.go
- fmt.Println → slog в cmd/ (qfs, migrate, migrate_ops_projects, migrate_project_updated_at)
- Заголовки recovery/verify добавлены во все 28 SQL-миграций
- Добавлены bible-local/runtime-flows.md и bible-local/decisions/
- Обновлён субмодуль bible до v0.2.0-13

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

internal/handlers/pricelist.go

@@ -106,11 +106,16 @@ func (h *PricelistHandler) List(c *gin.Context) {
 		})
 	}
 
+	totalPages := (total + perPage - 1) / perPage
+	if totalPages < 1 {
+		totalPages = 1
+	}
 	c.JSON(http.StatusOK, gin.H{
-		"pricelists": summaries,
-		"total":      total,
-		"page":       page,
-		"per_page":   perPage,
+		"items":       summaries,
+		"total_count": total,
+		"page":        page,
+		"per_page":    perPage,
+		"total_pages": totalPages,
 	})
 }
 
@@ -119,7 +124,7 @@ func (h *PricelistHandler) Get(c *gin.Context) {
 	idStr := c.Param("id")
 	id, err := strconv.ParseUint(idStr, 10, 32)
 	if err != nil {
-		c.JSON(http.StatusBadRequest, gin.H{"error": "invalid pricelist ID"})
+		c.JSON(http.StatusUnprocessableEntity, gin.H{"error": "invalid pricelist ID"})
 		return
 	}
 
@@ -146,7 +151,7 @@ func (h *PricelistHandler) GetItems(c *gin.Context) {
 	idStr := c.Param("id")
 	id, err := strconv.ParseUint(idStr, 10, 32)
 	if err != nil {
-		c.JSON(http.StatusBadRequest, gin.H{"error": "invalid pricelist ID"})
+		c.JSON(http.StatusUnprocessableEntity, gin.H{"error": "invalid pricelist ID"})
 		return
 	}
 
@@ -165,40 +170,21 @@ func (h *PricelistHandler) GetItems(c *gin.Context) {
 	if perPage < 1 {
 		perPage = 50
 	}
-	var items []localdb.LocalPricelistItem
-	dbq := h.localDB.DB().Model(&localdb.LocalPricelistItem{}).Where("pricelist_id = ?", localPL.ID)
-	if strings.TrimSpace(search) != "" {
-		dbq = dbq.Where("lot_name LIKE ?", "%"+strings.TrimSpace(search)+"%")
-	}
-	var total int64
-	if err := dbq.Count(&total).Error; err != nil {
-		RespondError(c, http.StatusInternalServerError, "internal server error", err)
-		return
-	}
-	offset := (page - 1) * perPage
 
-	if err := dbq.Order("lot_name").Offset(offset).Limit(perPage).Find(&items).Error; err != nil {
+	items, total, err := h.localDB.GetLocalPricelistItemsPage(localPL.ID, strings.TrimSpace(search), page, perPage)
+	if err != nil {
 		RespondError(c, http.StatusInternalServerError, "internal server error", err)
 		return
 	}
+
 	lotNames := make([]string, len(items))
 	for i, item := range items {
 		lotNames[i] = item.LotName
 	}
-	type compRow struct {
-		LotName        string
-		LotDescription string
-	}
-	var comps []compRow
-	if len(lotNames) > 0 {
-		h.localDB.DB().Table("local_components").
-			Select("lot_name, lot_description").
-			Where("lot_name IN ?", lotNames).
-			Scan(&comps)
-	}
-	descMap := make(map[string]string, len(comps))
-	for _, c := range comps {
-		descMap[c.LotName] = c.LotDescription
+	descMap, err := h.localDB.GetLocalComponentDescriptionsByLotNames(lotNames)
+	if err != nil {
+		RespondError(c, http.StatusInternalServerError, "internal server error", err)
+		return
 	}
 
 	resultItems := make([]gin.H, 0, len(items))
@@ -217,12 +203,14 @@ func (h *PricelistHandler) GetItems(c *gin.Context) {
 		})
 	}
 
+	totalPages := int((total + int64(perPage) - 1) / int64(perPage))
 	c.JSON(http.StatusOK, gin.H{
-		"source":   localPL.Source,
-		"items":    resultItems,
-		"total":    total,
-		"page":     page,
-		"per_page": perPage,
+		"source":      localPL.Source,
+		"items":       resultItems,
+		"total_count": total,
+		"page":        page,
+		"per_page":    perPage,
+		"total_pages": totalPages,
 	})
 }
 
@@ -230,7 +218,7 @@ func (h *PricelistHandler) GetLotNames(c *gin.Context) {
 	idStr := c.Param("id")
 	id, err := strconv.ParseUint(idStr, 10, 32)
 	if err != nil {
-		c.JSON(http.StatusBadRequest, gin.H{"error": "invalid pricelist ID"})
+		c.JSON(http.StatusUnprocessableEntity, gin.H{"error": "invalid pricelist ID"})
 		return
 	}