feat(cli): stack prisma fetch --workers (refs #659)

src/cli/prisma.py

@@ -253,6 +253,12 @@ def flow(
 def fetch(
     name: str = typer.Argument(..., help="Project slug."),
     limit: int = typer.Option(0, "--limit", "-n"),
+    workers: int = typer.Option(
+        8,
+        "--workers",
+        "-w",
+        help="Concurrent fetch workers (fallback tier stays serialized).",
+    ),
     db: Path = typer.Option(_DEFAULT_ZOT, "--db"),
     storage: Path = typer.Option(_DEFAULT_STORAGE, "--storage"),
     scratch: Path = typer.Option(Path(".state/prisma-fetch"), "--scratch"),
@@ -327,6 +333,7 @@ def fetch(
                 email=email,
                 fetch_proxy=fetch_proxy,
                 limit=limit or None,
+                workers=workers,
             )
 
     stats = _hold(_go, hold=hold)