refactor(types): 消除非必要 as 逃逸，锁紧 strict 政策

按 Oracle 复核处置全仓 5 处类型断言：

- fields.ts: as const → satisfies Record<GeneratedFieldKey, true>
- compile.ts: as readonly string[] → ReadonlySet<string>.has()
- embed-migrations.ts: JSON.parse as Journal → Zod schema 运行时校验，JSON.parse 显式 unknown
- interceptors.ts: 唯一保留的跨包断言（ORPC→Zod）注释扩写为完整背景
- router.tsx: satisfies 非 cast，保留

biome.json 增配 noExplicitAny / noTsIgnore / noNonNullAssertion，防止后续漂移。

compile.ts

@@ -12,8 +12,9 @@ const SUPPORTED_TARGETS: readonly Bun.Build.CompileTarget[] = [
   'bun-linux-arm64',
 ]
 
-const isSupportedTarget = (value: string): value is Bun.Build.CompileTarget =>
-  (SUPPORTED_TARGETS as readonly string[]).includes(value)
+const SUPPORTED_TARGET_SET: ReadonlySet<string> = new Set(SUPPORTED_TARGETS)
+
+const isSupportedTarget = (value: string): value is Bun.Build.CompileTarget => SUPPORTED_TARGET_SET.has(value)
 
 const { values } = parseArgs({
   options: { target: { type: 'string' } },