fix(bluesky-pds): exec into renamed 'pds' service (pairs with recipe rename app->pds)

The recipe renames its main service app->pds so caddy resolves THIS stack's PDS on the shared proxy
(abra drops compose network aliases, so a rename is the robust fix). Update the two exec_in_app calls
to service=pds to match. Same assertions.

tests/bluesky-pds/_p4.py

@@ -37,7 +37,7 @@ def _goat_admin(domain: str, args: str) -> str:
         f'--admin-password "$(cat /run/secrets/pds_admin_password)" '
         f"--pds-host {PDS_HOST_LOCAL} 2>&1"
     )
-    return lifecycle.exec_in_app(domain, ["sh", "-c", cmd], timeout=120)
+    return lifecycle.exec_in_app(domain, ["sh", "-c", cmd], service="pds", timeout=120)
 
 
 def account_did(domain: str) -> str | None:

tests/bluesky-pds/custom/test_account_and_post.py

@@ -46,7 +46,7 @@ def _in_container(domain: str, shell_cmd: str) -> str:
     """Run `shell_cmd` inside the PDS app container via exec_in_app (sh -c wrapper)."""
     # The admin_pw_flag uses $(cat ...) which only the sh inside the container can expand —
     # callers pass the raw shell command including those substitutions.
-    return lifecycle.exec_in_app(domain, ["sh", "-c", shell_cmd], timeout=120)
+    return lifecycle.exec_in_app(domain, ["sh", "-c", shell_cmd], service="pds", timeout=120)
 
 
 def _goat_admin(domain: str, args: str) -> str: