fix: registry number re-allocation on company change + extreme PDF large file support

- Registratura: re-allocate number when company/direction changes on update,
  recalculate old company's sequence counter from actual entries
- Extreme PDF: stream body to temp file instead of req.formData() to support large files

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

src/app/api/registratura/route.ts

@@ -14,7 +14,7 @@ import type { Prisma } from "@prisma/client";
 import { v4 as uuid } from "uuid";
 import { prisma } from "@/core/storage/prisma";
 import { getAuthSession } from "@/core/auth";
-import { allocateSequenceNumber } from "@/modules/registratura/services/registry-service";
+import { allocateSequenceNumber, recalculateSequence } from "@/modules/registratura/services/registry-service";
 import {
   logAuditEvent,
   computeEntryDiff,
@@ -349,9 +349,21 @@ export async function PUT(req: NextRequest) {
     delete updates.createdBy;
     delete updates.createdByName;
 
+    // Re-allocate registry number when company or direction changes
+    const companyChanged = updates.company && updates.company !== existing.company;
+    const directionChanged = updates.direction && updates.direction !== existing.direction;
+    let newNumber: string | undefined;
+    if (companyChanged || directionChanged) {
+      const targetCompany = (updates.company ?? existing.company) as CompanyId;
+      const targetDirection = (updates.direction ?? existing.direction) as RegistryDirection;
+      const allocated = await allocateSequenceNumber(targetCompany, targetDirection);
+      newNumber = allocated.number;
+    }
+
     const updated: RegistryEntry = {
       ...existing,
       ...updates,
+      ...(newNumber ? { number: newNumber } : {}),
       updatedAt: new Date().toISOString(),
     };
 
@@ -364,6 +376,14 @@ export async function PUT(req: NextRequest) {
 
     await saveEntryToDB(updated);
 
+    // Recalculate old company's counter so next entry gets the correct number
+    if (companyChanged || directionChanged) {
+      await recalculateSequence(
+        existing.company as CompanyId,
+        existing.direction as RegistryDirection,
+      );
+    }
+
     if (diff) {
       const action = updates.status === "inchis" && existing.status !== "inchis"
         ? "closed" as const
@@ -373,11 +393,11 @@ export async function PUT(req: NextRequest) {
 
       await logAuditEvent({
         entryId: id,
-        entryNumber: existing.number,
+        entryNumber: updated.number,
         action,
         actor: actor.id,
         actorName: actor.name,
-        company: existing.company,
+        company: updated.company,
         detail: { changes: diff },
       });
     }