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/modules/registratura/services/registry-service.ts

@@ -252,6 +252,51 @@ export async function allocateSequenceNumber(
   };
 }
 
+/**
+ * Recalculate a company's sequence counter to match actual entries in the DB.
+ * Called when an entry is reassigned away from a company, so the counter
+ * reflects the real max sequence instead of staying artificially high.
+ */
+export async function recalculateSequence(
+  company: CompanyId,
+  direction: RegistryDirection,
+  year?: number,
+): Promise<void> {
+  const { prisma } = await import("@/core/storage/prisma");
+
+  const companyPrefix = REGISTRY_COMPANY_PREFIX[company];
+  const typeCode = DIRECTION_TYPE_CODE[direction];
+  const yr = year ?? new Date().getFullYear();
+
+  // Find the actual max sequence from entries in KeyValueStore
+  const pattern = `${companyPrefix}-${yr}-${typeCode}-%`;
+  const rows = await prisma.$queryRaw<Array<{ maxSeq: number | null }>>`
+    SELECT MAX(
+      CAST(SUBSTRING(value::text FROM ${`${companyPrefix}-${yr}-${typeCode}-(\\d{5})`}) AS INTEGER)
+    ) AS "maxSeq"
+    FROM "KeyValueStore"
+    WHERE namespace = 'registratura'
+      AND key LIKE 'entry:%'
+      AND value::text LIKE ${`%"number":"${pattern}"%`}
+  `;
+
+  const actualMax = rows[0]?.maxSeq ?? 0;
+
+  // Reset the counter to the actual max (or delete if 0)
+  if (actualMax === 0) {
+    await prisma.$executeRaw`
+      DELETE FROM "RegistrySequence"
+      WHERE company = ${companyPrefix} AND year = ${yr} AND type = ${typeCode}
+    `;
+  } else {
+    await prisma.$executeRaw`
+      UPDATE "RegistrySequence"
+      SET "lastSeq" = ${actualMax}, "updatedAt" = NOW()
+      WHERE company = ${companyPrefix} AND year = ${yr} AND type = ${typeCode}
+    `;
+  }
+}
+
 // ── Number format detection + parsing ──
 
 export interface ParsedRegistryNumber {