Upgrade PHPStan to 2.x and raise analysis level from 6 to 10

- Bump phpstan/phpstan ^2.0 and szepeviktor/phpstan-wordpress ^2.0
- Move the analysis level into phpstan.neon (single source) and raise it to 10
- Add Val, a runtime coercion helper that narrows untyped WordPress boundary
  values (wpdb rows, REST params, superglobals, options) with explicit checks
  instead of blind casts, plus unit tests
- Type value-object fromRow() params as stdClass (what wpdb returns) and map
  columns through Val so unexpected shapes degrade safely
- Use %i identifier placeholders for table names in all wpdb::prepare() calls
  so every query string is a literal and identifiers are escaped by WordPress;
  raises the minimum WordPress version to 6.2 where %i was introduced
- Guard wpdb::prepare() null result before wpdb::query() in updateTax()
- Fix nullable get_permalink()/strtotime() handling, list types at REST and
  capability call sites, dead null-coalescing on checked superglobals, and
  narrow get_users() results before mapping
- Register Val method names with the ValidatedSanitizedInput sniff so it
  validates the real sanitizer around each superglobal read
- Update repository unit tests for the %i placeholder arguments

Co-Authored-By: Claude Fable 5 <[email protected]>

src/Auth/Invite.php

@@ -3,6 +3,8 @@ declare(strict_types=1);
 
 namespace Unsupervised\Schedular\Auth;
 
+use Unsupervised\Schedular\Val;
+
 class Invite {
 
 	public const STATUS_PENDING  = 'pending';
@@ -44,17 +46,17 @@ class Invite {
 		public readonly ?int $id = null,
 	) {}
 
-	public static function fromRow( object $row ): self {
+	public static function fromRow( \stdClass $row ): self {
 		return new self(
-			email:          $row->email,
-			token:          $row->token,
-			role:           $row->role,
-			status:         $row->status,
-			invitedBy:      null !== $row->invited_by ? (int) $row->invited_by : null,
-			acceptedUserId: null !== $row->accepted_user_id ? (int) $row->accepted_user_id : null,
-			acceptedAt:     $row->accepted_at,
-			createdAt:      $row->created_at ?? null,
-			id:             (int) $row->id,
+			email:          Val::string( $row->email ),
+			token:          Val::string( $row->token ),
+			role:           Val::string( $row->role ),
+			status:         Val::string( $row->status ),
+			invitedBy:      Val::intOrNull( $row->invited_by ),
+			acceptedUserId: Val::intOrNull( $row->accepted_user_id ),
+			acceptedAt:     Val::stringOrNull( $row->accepted_at ),
+			createdAt:      Val::stringOrNull( $row->created_at ?? null ),
+			id:             Val::int( $row->id ),
 		);
 	}