fix: reject negative weights/quantities and out-of-range percentages

None of these numeric business fields had a lower bound, so a
negative honey weight, jar count, feeding amount, mite count, or
stock quantity was silently accepted - each would corrupt whatever
total or statistic it later feeds into. Added @Min(0):

- Harvest: honeySuperCount, grossWeight, netWeight
- HoneyBatch: amount (+ @Max(100) on waterContent, a percentage)
- HoneyMeasurement: waterContent (+ @Max(100))
- Feeding: amount
- Extraction: amount (+ @Max(100) on waterContent)
- StockItem: quantity, minThreshold
- VarroaMeasurement: durationMinutes, miteCount, calculatedValue

Left temperature fields alone (extraction, inspection) - genuinely
can be negative (winter inspections, outdoor storage) and no
confident domain bound exists to apply instead. Update DTOs for these
entities all extend PartialType(PickType(Create...Dto, [...])) from
@nestjs/swagger, which preserves validation decorators, so no
separate change was needed there.

Co-Authored-By: Claude Sonnet 5 <[email protected]>

ApiCore-Backend/src/extractions/dto/create-extraction.dto.ts

@@ -6,6 +6,8 @@ import {
   IsNumber,
   IsOptional,
   IsString,
+  Max,
+  Min,
 } from 'class-validator';
 
 export class CreateExtractionDto {
@@ -22,6 +24,7 @@ export class CreateExtractionDto {
   @ApiPropertyOptional()
   @IsOptional()
   @IsNumber()
+  @Min(0)
   amount?: number;
 
   @ApiPropertyOptional()
@@ -32,6 +35,8 @@ export class CreateExtractionDto {
   @ApiPropertyOptional()
   @IsOptional()
   @IsNumber()
+  @Min(0)
+  @Max(100)
   waterContent?: number;
 
   @ApiPropertyOptional()

ApiCore-Backend/src/feedings/dto/create-feeding.dto.ts

@@ -5,6 +5,7 @@ import {
   IsNumber,
   IsOptional,
   IsString,
+  Min,
 } from 'class-validator';
 import { FeedType } from '../../../generated/prisma';
 
@@ -28,6 +29,7 @@ export class CreateFeedingDto {
 
   @ApiProperty()
   @IsNumber()
+  @Min(0)
   amount!: number;
 
   @ApiProperty()

ApiCore-Backend/src/harvests/dto/create-harvest.dto.ts

@@ -7,6 +7,7 @@ import {
   IsNumber,
   IsOptional,
   IsString,
+  Min,
 } from 'class-validator';
 
 export class CreateHarvestDto {
@@ -32,16 +33,19 @@ export class CreateHarvestDto {
   @ApiPropertyOptional()
   @IsOptional()
   @IsInt()
+  @Min(0)
   honeySuperCount?: number;
 
   @ApiPropertyOptional()
   @IsOptional()
   @IsNumber()
+  @Min(0)
   grossWeight?: number;
 
   @ApiPropertyOptional()
   @IsOptional()
   @IsNumber()
+  @Min(0)
   netWeight?: number;
 
   @ApiPropertyOptional()

ApiCore-Backend/src/honey-batches/dto/create-honey-batch.dto.ts

@@ -1,5 +1,5 @@
 import { ApiProperty, ApiPropertyOptional } from '@nestjs/swagger';
-import { IsNumber, IsOptional, IsString } from 'class-validator';
+import { IsNumber, IsOptional, IsString, Max, Min } from 'class-validator';
 
 export class CreateHoneyBatchDto {
   @ApiPropertyOptional({
@@ -22,11 +22,14 @@ export class CreateHoneyBatchDto {
   @ApiPropertyOptional()
   @IsOptional()
   @IsNumber()
+  @Min(0)
   amount?: number;
 
   @ApiPropertyOptional()
   @IsOptional()
   @IsNumber()
+  @Min(0)
+  @Max(100)
   waterContent?: number;
 
   @ApiPropertyOptional()

ApiCore-Backend/src/honey-batches/dto/create-honey-measurement.dto.ts

@@ -1,9 +1,18 @@
 import { ApiProperty, ApiPropertyOptional } from '@nestjs/swagger';
-import { IsDateString, IsNumber, IsOptional, IsString } from 'class-validator';
+import {
+  IsDateString,
+  IsNumber,
+  IsOptional,
+  IsString,
+  Max,
+  Min,
+} from 'class-validator';
 
 export class CreateHoneyMeasurementDto {
   @ApiProperty()
   @IsNumber()
+  @Min(0)
+  @Max(100)
   waterContent!: number;
 
   @ApiProperty()

ApiCore-Backend/src/storage/dto/create-stock-item.dto.ts

@@ -1,5 +1,5 @@
 import { ApiProperty, ApiPropertyOptional } from '@nestjs/swagger';
-import { IsEnum, IsNumber, IsOptional, IsString } from 'class-validator';
+import { IsEnum, IsNumber, IsOptional, IsString, Min } from 'class-validator';
 import { StockCategory } from '../../../generated/prisma';
 
 export class CreateStockItemDto {
@@ -18,11 +18,13 @@ export class CreateStockItemDto {
   @ApiPropertyOptional()
   @IsOptional()
   @IsNumber()
+  @Min(0)
   quantity?: number;
 
   @ApiPropertyOptional()
   @IsOptional()
   @IsNumber()
+  @Min(0)
   minThreshold?: number;
 
   @ApiPropertyOptional()

ApiCore-Backend/src/varroa/dto/create-varroa-measurement.dto.ts

@@ -6,6 +6,7 @@ import {
   IsNumber,
   IsOptional,
   IsString,
+  Min,
 } from 'class-validator';
 import { VarroaMethod } from '../../../generated/prisma';
 
@@ -25,16 +26,19 @@ export class CreateVarroaMeasurementDto {
   @ApiPropertyOptional()
   @IsOptional()
   @IsInt()
+  @Min(0)
   durationMinutes?: number;
 
   @ApiPropertyOptional()
   @IsOptional()
   @IsInt()
+  @Min(0)
   miteCount?: number;
 
   @ApiPropertyOptional()
   @IsOptional()
   @IsNumber()
+  @Min(0)
   calculatedValue?: number;
 
   @ApiPropertyOptional()