Add nightly town sync from ArcGIS API with autocomplete

- Add towns table with town_pid, town_name, state, population, town_class, date_retired
- Add AustralianState enum with label and abbreviation helpers
- Add Town model with active() and search() scopes
- Add SyncTowns job that paginates ArcGIS API and upserts all 1977 towns
- Schedule SyncTowns to run nightly at 02:00
- Add /towns/search endpoint returning JSON suggestions filtered by name and state
- Add Alpine-powered autocomplete on origin/destination fields in create form
- Add state filter dropdown in journeys card header to narrow autocomplete results

routes/web.php

@@ -1,5 +1,7 @@
 <?php
 
+use App\Models\Town;
+use Illuminate\Http\Request;
 use Illuminate\Support\Facades\Auth;
 use Illuminate\Support\Facades\Route;
 
@@ -11,9 +13,34 @@ Route::post('/logout', function () {
     Auth::logout();
     session()->invalidate();
     session()->regenerateToken();
+
     return redirect()->route('login');
 })->name('logout')->middleware('auth');
 
+// Town autocomplete search
+Route::middleware(['auth'])->get('/towns/search', function (Request $request) {
+    $query = $request->string('query')->trim();
+
+    if ($query->length() < 2) {
+        return response()->json([]);
+    }
+
+    $towns = Town::active()
+        ->search($query)
+        ->when($request->filled('state'), fn ($q) => $q->where('state', $request->integer('state')))
+        ->orderBy('town_name')
+        ->limit(10)
+        ->get(['town_name', 'state']);
+
+    return response()->json(
+        $towns->map(fn ($town) => [
+            'name' => $town->town_name,
+            'state' => $town->state->abbreviation(),
+            'label' => $town->town_name.', '.$town->state->abbreviation(),
+        ])
+    );
+})->name('towns.search');
+
 // Authenticated
 Route::middleware(['auth'])->group(function () {
     Route::livewire('/dashboard', 'dashboard')->name('dashboard');