Add background bulk import for Komoot

Replace the per-tour import UI with a fire-and-forget background job:

- Add `import_batches` DB table tracking status, found/imported/duplicate counts
- Add `runKomootBulkImport` server function that pages all Komoot tours,
  fetches GPX, creates activities, and deduplicates via sync_imports
- Add `komoot-bulk-import` pg-boss job registered at server startup
- Add POST /api/sync/komoot/import to enqueue the job
- Add GET /api/sync/komoot/import-status to return the latest batch
- Replace the Komoot import page with a progress UI that polls every 2s
  while a batch is running and shows found/imported/skipped counts

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

packages/db/src/schema/journal.ts

@@ -276,6 +276,26 @@ export const syncPushes = journalSchema.table(
 // row in this change. `acceptedAt` is always set today (auto-accept for
 // public local profiles); the column stays nullable so federation's Pending
 // state lands cleanly.
+export type ImportBatchStatus = "pending" | "running" | "completed" | "failed";
+
+export const importBatches = journalSchema.table("import_batches", {
+  id: text("id").primaryKey(),
+  userId: text("user_id")
+    .notNull()
+    .references(() => users.id, { onDelete: "cascade" }),
+  connectionId: text("connection_id")
+    .notNull()
+    .references(() => connectedServices.id, { onDelete: "cascade" }),
+  provider: text("provider").notNull(),
+  status: text("status").$type<ImportBatchStatus>().notNull().default("pending"),
+  totalFound: integer("total_found").notNull().default(0),
+  importedCount: integer("imported_count").notNull().default(0),
+  duplicateCount: integer("duplicate_count").notNull().default(0),
+  errorMessage: text("error_message"),
+  startedAt: timestamp("started_at", { withTimezone: true }).notNull().defaultNow(),
+  completedAt: timestamp("completed_at", { withTimezone: true }),
+});
+
 export const follows = journalSchema.table("follows", {
   id: text("id").primaryKey(),
   followerId: text("follower_id")