feat(db): switch runtime storage to SQLite repository

Point routes, scheduler, and push service at fcmTokensSqlite so the service no longer reads or writes the JSON store.

src/db/fcmTokensSqlite.ts

@@ -1,13 +1,23 @@
 import { randomUUID } from "node:crypto";
-import type { StoredRow } from "./fcmTokens.js";
 import { getDatabase } from "./sqlite.js";
 
 /**
  * SQLite-backed FCM registration repository.
- * This is the service's storage backend; the JSON repository remains only until switch-over.
+ * This is the service's storage backend.
+ * The JSON repository is unused at runtime and will be removed in a later cleanup.
  * There is no production-data migration from JSON.
  */
-export type { StoredRow };
+export type StoredRow = {
+  id: string;
+  userId: string;
+  deviceId: string;
+  fcmToken: string;
+  platform: string;
+  testMode?: boolean;
+  createdAt: string;
+  updatedAt: string;
+  lastNotifiedAt?: number;
+};
 
 type DbRow = {
   id: string;

src/routes/debug.ts

@@ -1,5 +1,5 @@
 import express, { Router } from "express";
-import { db } from "../db/fcmTokens.js";
+import { db } from "../db/fcmTokensSqlite.js";
 import {
   requireAuth,
   requireAuthOrNotificationLocalTest,

src/routes/notifications.ts

@@ -1,5 +1,5 @@
 import express, { Router } from "express";
-import { db } from "../db/fcmTokens.js";
+import { db } from "../db/fcmTokensSqlite.js";
 import {
   requireAuthOrNotificationLocalTest,
   requireEndorserAuth,

src/scheduler.ts

@@ -1,4 +1,4 @@
-import { db } from "./db/fcmTokens.js";
+import { db } from "./db/fcmTokensSqlite.js";
 import { sendPushToDevice } from "./services/pushService.js";
 import { errorMessage, formatElapsedMs } from "./util/formatElapsed.js";
 

src/services/pushService.ts

@@ -1,4 +1,4 @@
-import { db, type StoredRow } from "../db/fcmTokens.js";
+import { db, type StoredRow } from "../db/fcmTokensSqlite.js";
 import { errorMessage, formatElapsedMs } from "../util/formatElapsed.js";
 import { maskToken } from "../util/maskToken.js";
 import { messaging } from "./firebase.js";