feat: Stock Correction Modal (#47)

* feat: add stock correction modal with blister-based input

- Add 'Correct Stock' button to medication detail modal
- New modal with Full Blisters + Partial Blister Pills inputs
- Auto-conversion for edge cases (full/negative partial)
- New stockAdjustment field for DB corrections without touching looseTablets
- New lastStockCorrectionAt timestamp to ignore old consumed doses after correction
- Tracking data preserved for future statistics
- Add Drizzle migrations for new columns
- Add translations for en/de

* fix: add stock_adjustment columns to e2e/integration test schemas

frontend/src/i18n/de.json

@@ -330,7 +330,8 @@
     "fullBlister": "voller Blister",
     "fullBlisters": "volle Blister",
     "inBlister": "in 1 Blister",
-    "total": "gesamt"
+    "total": "gesamt",
+    "max": "max"
   },
   "share": {
     "button": "Teilen",
@@ -406,5 +407,18 @@
     "pillsAdded": "{{count}} Tablette",
     "pillsAdded_other": "{{count}} Tabletten",
     "button": "Nachfüllen"
+  },
+  "editStock": {
+    "title": "Bestand korrigieren",
+    "hint": "Dies ist für die Korrektur von Bestandsabweichungen. Für normale Bestandsänderungen nutze 'Nachfüllen'.",
+    "fullBlisters": "Volle Blister",
+    "partialBlisterPills": "Angebrochener Blister",
+    "pillsPerBlister": "(je {{count}} Tabletten)",
+    "currentTotal": "Aktueller Bestand",
+    "newTotal": "Neuer Bestand",
+    "difference": "Differenz",
+    "save": "Korrektur speichern",
+    "saving": "Speichern...",
+    "success": "Bestand erfolgreich korrigiert"
   }
 }