fix(berths): natural-sort SQL ordering for mooring numbers

Drizzle SQL template was running `\d+$` through JS string-literal
escape rules, eating the backslash and matching every character class
\d alias instead of digits. Berths sorted lexically (A1, A10, A11,
A2, …) instead of by trailing number. Switch to `[0-9]+$` POSIX form
which survives the escape pass intact.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

src/lib/services/berths.service.ts

@@ -67,7 +67,7 @@ export async function listBerths(portId: string, query: ListBerthsQuery) {
   // map. The mooring format is locked at `^[A-Z]+\d+$` so the regexp
   // splits are safe.
   const NATURAL_MOORING_SORT = [
-    sql`regexp_replace(${berths.mooringNumber}, '\d+$', '') ASC`,
+    sql`regexp_replace(${berths.mooringNumber}, '[0-9]+$', '') ASC`,
     sql`(regexp_replace(${berths.mooringNumber}, '^[A-Z]+', ''))::int ASC`,
   ];