refactor: reuse yaml parser helpers in sub2api cli (#363)

Co-authored-by: Codex <codex@noreply.local>

scripts/src/platform-infra.ts

@@ -7,6 +7,7 @@ import { startJob } from "./jobs";
 import type { RenderedCliResult } from "./output";
 import { pk01CaddyMergeManagedBlocksPython, renderCaddyManagedBlock, renderSimpleReverseProxyCaddySiteBlock } from "./pk01-caddy";
 import { capture, compactCapture, parseJsonOutput, prepareFrpcSecret, shQuote } from "./platform-infra-public-service";
+import { yamlBooleanField, yamlIntegerField } from "./platform-infra-ops-library";
 import { fingerprintSecretValues, parseEnvFile, readEnvSourceFile, readTextFile, redactRepoPath, requiredEnvValue } from "./secrets";
 
 const serviceName = "sub2api";
@@ -784,9 +785,7 @@ function objectField(obj: Record<string, unknown>, key: string, path: string): R
 }
 
 function booleanField(obj: Record<string, unknown>, key: string, path: string): boolean {
-  const value = obj[key];
-  if (typeof value !== "boolean") throw new Error(`${configPath}.${path}.${key} must be a boolean`);
-  return value;
+  return yamlBooleanField(obj, key, yamlConfigLabel(path), path);
 }
 
 function stringArrayField(obj: Record<string, unknown>, key: string, path: string): string[] {
@@ -804,9 +803,7 @@ function enumField<const T extends readonly string[]>(obj: Record<string, unknow
 }
 
 function integerField(obj: Record<string, unknown>, key: string, path: string): number {
-  const value = obj[key];
-  if (typeof value !== "number" || !Number.isInteger(value)) throw new Error(`${configPath}.${path}.${key} must be an integer`);
-  return value;
+  return yamlIntegerField(obj, key, yamlConfigLabel(path), path);
 }
 
 function integerArrayField(obj: Record<string, unknown>, key: string, path: string): number[] {
@@ -817,6 +814,10 @@ function integerArrayField(obj: Record<string, unknown>, key: string, path: stri
   return value;
 }
 
+function yamlConfigLabel(path: string): string {
+  return path.length === 0 ? `${configPath}.` : configPath;
+}
+
 function isKubernetesName(value: string): boolean {
   return /^[a-z0-9]([-a-z0-9]*[a-z0-9])?$/u.test(value);
 }