fix(release): address the Amazon submission API by app id instead of package name

The App Submission API stopped resolving apps by package name and now
returns 400 "No app found with the entered Inputs"; it requires the
amzn1.devportal.mobileapp app id from the console URL. Read the id from
AMAZON_APPSTORE_APP_ID, validate it in preflight, and keep the package
name for console-facing messages.

scripts/release/deploy.py

@@ -41,6 +41,8 @@ Credentials come from .env at the repository root (same file fastlane used):
     SUPPLY_JSON_KEY_DATA / SUPPLY_JSON_KEY   Play service-account JSON (data or path)
     SUPPLY_PACKAGE_NAME                      Android package name
     AMAZON_APPSTORE_CLIENT_ID / _CLIENT_SECRET / _PACKAGE_NAME
+    AMAZON_APPSTORE_APP_ID                   Amazon App ID (amzn1.devportal.
+                                             mobileapp...., from the console URL)
     DELIVER_APP_IDENTIFIER                   Apple bundle id
     ASC_KEY_ID / ASC_ISSUER_ID / ASC_KEY_PATH
                                              App Store Connect team API key
@@ -480,6 +482,7 @@ def phase_preflight(ctx: Context) -> None:
                 "AMAZON_APPSTORE_CLIENT_ID",
                 "AMAZON_APPSTORE_CLIENT_SECRET",
                 "AMAZON_APPSTORE_PACKAGE_NAME",
+                "AMAZON_APPSTORE_APP_ID",
             ],
             "amazon",
         )
@@ -488,6 +491,12 @@ def phase_preflight(ctx: Context) -> None:
                 "amazon: AMAZON_APPSTORE_PACKAGE_NAME must be com.edde746.plezy3; "
                 f"got {env['AMAZON_APPSTORE_PACKAGE_NAME']!r}"
             )
+        if not env["AMAZON_APPSTORE_APP_ID"].startswith("amzn1.devportal.mobileapp."):
+            raise DeployError(
+                "amazon: AMAZON_APPSTORE_APP_ID must be the amzn1.devportal.mobileapp. "
+                "app id from the developer-console URL; the API no longer accepts "
+                f"package names; got {env['AMAZON_APPSTORE_APP_ID']!r}"
+            )
     if pending & {"ios", "tvos", "asc"}:
         require_env(
             env,
@@ -957,13 +966,15 @@ def _commit_amazon_edit(ctx: Context, client: AmazonClient, edit_id: str) -> Non
 
 def phase_amazon(ctx: Context) -> None:
     package = ctx.env["AMAZON_APPSTORE_PACKAGE_NAME"]
+    # The submission API addresses apps by Amazon app id; package names 400.
+    app_id = ctx.env["AMAZON_APPSTORE_APP_ID"]
     apk = ROOT / "build/app/outputs/flutter-apk/app-release.apk"
     if dry_guard(ctx, f"build Amazon APK, replace binary in an edit for {package}, commit"):
         return
     pending_edit_id = ctx.state.data.get("amazon_pending_edit_id")
     if pending_edit_id:
         log(f"amazon: resuming pending edit {pending_edit_id} without replacing its APK")
-        client = AmazonClient(package, _amazon_token(ctx.env))
+        client = AmazonClient(app_id, _amazon_token(ctx.env))
         _commit_amazon_edit(ctx, client, str(pending_edit_id))
         return
 
@@ -989,7 +1000,7 @@ def phase_amazon(ctx: Context) -> None:
     if not apk.is_file():
         raise DeployError(f"amazon: APK not found at {apk}")
 
-    client = AmazonClient(package, _amazon_token(ctx.env))
+    client = AmazonClient(app_id, _amazon_token(ctx.env))
 
     edits_response = client.request("GET", "/edits")
     edits = edits_response.json() if edits_response.text.strip() else {}

scripts/release/test_deploy.py

@@ -528,7 +528,10 @@ class DeferredPhaseTest(unittest.TestCase):
         defaults.update(args)
         return deploy.Context(
             args=SimpleNamespace(**defaults),
-            env={"AMAZON_APPSTORE_PACKAGE_NAME": "com.example.app"},
+            env={
+                "AMAZON_APPSTORE_PACKAGE_NAME": "com.example.app",
+                "AMAZON_APPSTORE_APP_ID": "amzn1.devportal.mobileapp.fixture",
+            },
             state=state,
             phases=["amazon", "publish"],
         )