feat(inventory): photo-first drafts + on-device OCR (digitization R2+R4)

Lower the bulk-digitization cliff with two more routes on top of the
already-landed CSV import and "save and add another":

- Photo-first drafts (capture now, catalogue later): burst-capture
  photos (camera or multi-gallery) into unnamed draft varieties, shown
  in a "to catalogue" tray, hidden from the main list until named.
  Adds Variety.isDraft (schema), addDraftVariety/watchDrafts/nameDraft,
  the triage sheet and the inventory banner.
- On-device OCR label suggestion (Tesseract, offline, no Google): a
  "Suggest name from photo" button in the naming dialog behind a
  LabelTextExtractor interface (Tesseract on Android/iOS, no-op
  elsewhere). Reads the largest print via hOCR bounding boxes, drops
  boilerplate/low-confidence noise, preprocesses (grayscale, contrast,
  upscale) and sweeps rotations (0-315 deg) so tilted packets still
  read. Bundles tessdata_fast eng+spa; validated on-device against real
  packets. The photo is written to a temp file deleted immediately in a
  finally block (the plugin needs a path) - a bounded, documented
  exception to no-plaintext-at-rest.

This commit also carries the co-developed schema evolution v5 to v8 that
shares these files (organic flag, species viability years, crop
calendar, lot provenance/abundance/preservation format, condition
checks) plus their exports/migrations and i18n.

Tests: CSV/draft/OCR unit + widget + migration green in isolation.
Note: the full widget suite currently hangs (>10 min) - under investigation.

apps/app_seeds/lib/state/variety_detail_cubit.dart

@@ -2,6 +2,7 @@ import 'dart:async';
 import 'dart:typed_data';
 
 import 'package:commons_core/commons_core.dart';
+import 'package:drift/drift.dart' show Value;
 import 'package:equatable/equatable.dart';
 import 'package:flutter_bloc/flutter_bloc.dart';
 
@@ -44,13 +45,30 @@ class VarietyDetailCubit extends Cubit<VarietyDetailState> {
   final String varietyId;
   late final StreamSubscription<VarietyDetail?> _sub;
 
-  Future<void> updateFields({String? label, String? category, String? notes}) =>
-      _repo.updateVariety(
-        id: varietyId,
-        label: label,
-        category: category,
-        notes: notes,
-      );
+  Future<void> updateFields({
+    String? label,
+    String? category,
+    String? notes,
+    bool? isOrganic,
+    bool? needsReproduction,
+    Value<int?> sowMonths = const Value.absent(),
+    Value<int?> transplantMonths = const Value.absent(),
+    Value<int?> floweringMonths = const Value.absent(),
+    Value<int?> fruitingMonths = const Value.absent(),
+    Value<int?> seedHarvestMonths = const Value.absent(),
+  }) => _repo.updateVariety(
+    id: varietyId,
+    label: label,
+    category: category,
+    notes: notes,
+    isOrganic: isOrganic,
+    needsReproduction: needsReproduction,
+    sowMonths: sowMonths,
+    transplantMonths: transplantMonths,
+    floweringMonths: floweringMonths,
+    fruitingMonths: fruitingMonths,
+    seedHarvestMonths: seedHarvestMonths,
+  );
 
   Future<void> addLot({
     LotType type = LotType.seed,
@@ -58,6 +76,10 @@ class VarietyDetailCubit extends Cubit<VarietyDetailState> {
     int? month,
     Quantity? quantity,
     Presentation? presentation,
+    String? originName,
+    String? originPlace,
+    Abundance? abundance,
+    PreservationFormat? preservationFormat,
   }) => _repo.addLot(
     varietyId: varietyId,
     type: type,
@@ -65,6 +87,10 @@ class VarietyDetailCubit extends Cubit<VarietyDetailState> {
     harvestMonth: month,
     quantity: quantity,
     presentation: presentation,
+    originName: originName,
+    originPlace: originPlace,
+    abundance: abundance,
+    preservationFormat: preservationFormat,
   );
 
   Future<void> updateLot({
@@ -74,6 +100,10 @@ class VarietyDetailCubit extends Cubit<VarietyDetailState> {
     int? month,
     Quantity? quantity,
     Presentation? presentation,
+    String? originName,
+    String? originPlace,
+    Abundance? abundance,
+    PreservationFormat? preservationFormat,
   }) => _repo.updateLot(
     lotId: lotId,
     type: type,
@@ -81,6 +111,10 @@ class VarietyDetailCubit extends Cubit<VarietyDetailState> {
     harvestMonth: month,
     quantity: quantity,
     presentation: presentation,
+    originName: originName,
+    originPlace: originPlace,
+    abundance: abundance,
+    preservationFormat: preservationFormat,
   );
 
   Future<void> deleteLot(String lotId) => _repo.softDeleteLot(lotId);
@@ -120,6 +154,18 @@ class VarietyDetailCubit extends Cubit<VarietyDetailState> {
     germinatedCount: germinatedCount,
   );
 
+  Future<void> addConditionCheck({
+    required String lotId,
+    int? checkedOn,
+    int? containerCount,
+    DesiccantState? desiccantState,
+  }) => _repo.addConditionCheck(
+    lotId: lotId,
+    checkedOn: checkedOn,
+    containerCount: containerCount,
+    desiccantState: desiccantState,
+  );
+
   Future<void> deleteVariety() async {
     await _repo.softDeleteVariety(varietyId);
     emit(