feat(spaces): stamp bank-synced rows and hide internal space_id

Set space_id explicitly on bank-sync transaction inserts (avoids a per-row
lookup during sync and anchors the row to the account's space), and hide the
internal space_id foreign key from model serialization.

app/Models/AutomationRule.php

@@ -34,6 +34,11 @@ class AutomationRule extends Model
         'action_note_iv',
     ];
 
+    /** @var list<string> */
+    protected $hidden = [
+        'space_id',
+    ];
+
     protected function casts(): array
     {
         return [

app/Models/BankingConnection.php

@@ -54,6 +54,7 @@ class BankingConnection extends Model
     ];
 
     protected $hidden = [
+        'space_id',
         'api_token',
         'api_secret',
         'pending_accounts_data',

app/Models/Budget.php

@@ -34,6 +34,7 @@ class Budget extends Model
     /** @var list<string> */
     protected $hidden = [
         'period_duration',
+        'space_id',
     ];
 
     protected function casts(): array

app/Models/Label.php

@@ -31,6 +31,7 @@ class Label extends Model
      */
     protected $hidden = [
         'pivot',
+        'space_id',
     ];
 
     /** @return BelongsTo<User, $this> */

app/Services/Banking/TransactionSyncService.php

@@ -115,6 +115,7 @@ class TransactionSyncService
         try {
             $account->transactions()->create([
                 'user_id' => $account->user_id,
+                'space_id' => $account->space_id,
                 'description' => $formatted['description'],
                 'description_iv' => null,
                 'original_description' => $formatted['original_description'],

app/Services/Banking/WiseTransactionSyncService.php

@@ -166,6 +166,7 @@ class WiseTransactionSyncService
         try {
             $account->transactions()->create([
                 'user_id' => $account->user_id,
+                'space_id' => $account->space_id,
                 'description' => $parsed['description'],
                 'description_iv' => null,
                 'original_description' => $parsed['description'],