docs: make PHPDoc types more precise

Author: kenjis

phpstan-baseline.php

@@ -7431,11 +7431,6 @@
 	'count' => 1,
 	'path' => __DIR__ . '/system/Model.php',
 ];
-$ignoreErrors[] = [
-	'message' => '#^Property CodeIgniter\\\\Model\\:\\:\\$tempData type has no value type specified in iterable type array\\.$#',
-	'count' => 1,
-	'path' => __DIR__ . '/system/Model.php',
-];
 $ignoreErrors[] = [
 	'message' => '#^Return type \\(array\\|bool\\|float\\|int\\|object\\|string\\|null\\) of method CodeIgniter\\\\Model\\:\\:__call\\(\\) should be covariant with return type \\(\\$this\\(CodeIgniter\\\\BaseModel\\)\\|null\\) of method CodeIgniter\\\\BaseModel\\:\\:__call\\(\\)$#',
 	'count' => 1,

system/Model.php

@@ -40,7 +40,7 @@
  *      - allow intermingling calls to the builder
  *      - removes the need to use Result object directly in most cases
  *
- * @property BaseConnection $db
+ * @property-read BaseConnection $db
  *
  * @method $this groupBy($by, ?bool $escape = null)
  * @method $this groupEnd()
@@ -123,7 +123,8 @@ class Model extends BaseModel
      * so that we can capture it (not the builder)
      * and ensure it gets validated first.
      *
-     * @var array
+     * @var         array{escape: array, data: array}|array{}
+     * @phpstan-var array{escape: array<int|string, bool|null>, data: row_array}|array{}
      */
     protected $tempData = [];