fix(workouts): report manual saves through the outcome module and register the delete

A repeated submit that wrote nothing reads as a neutral notice rather
than a success. The delete control is entered in the destructive-control
registry, and its 409 code in the published error catalogue.

Refs #1085

src/lib/openapi/error-codes.ts

@@ -357,6 +357,7 @@ export const ERROR_CODE_CATALOGUE: Readonly<Record<string, readonly string[]>> =
       "workout.batch.payload_too_large",
       "workout.batch.source_not_permitted",
       "workout.batch.too_large",
+      "workout.delete.synced_source",
     ],
     "(unprefixed)": [
       "about_me_conflict",