fix: fail fast when connector override generation fails

backend/scripts/p2-acceptance.mjs

@@ -789,7 +789,7 @@ async function writeInstallationFiles(ctx) {
     },
   };
   await atomicWrite(fixtureOverridePath, yamlStringify(override, { lineWidth: 0, sortMapEntries: false }));
-  await runCommand({
+  const generated = await runCommand({
     executable: join(ctx.repositoryRoot, "scripts", "generate-connector-secrets-override.sh"),
     argv: [
       "--bindings-env", bindingsEnvPath,
@@ -800,6 +800,7 @@ async function writeInstallationFiles(ctx) {
     ],
     env: ctx.execEnv,
   });
+  if (generated.exitCode !== 0) throw new Error(`connector override generation failed: ${generated.stderr || generated.stdout}`);
   const installation = {
     profile: "server",
     projectDirectory: ctx.repositoryRoot,