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/Policy/PolicyRepository.php

@@ -36,7 +36,8 @@ class PolicyRepository {
 	public function findForScope( string $scope ): array {
 		$rows = $this->db->get_results(
 			$this->db->prepare(
-				"SELECT * FROM {$this->table} WHERE acceptance_scope = %s OR acceptance_scope = %s ORDER BY title ASC",
+				'SELECT * FROM %i WHERE acceptance_scope = %s OR acceptance_scope = %s ORDER BY title ASC',
+				$this->table,
 				$scope,
 				Policy::SCOPE_BOTH
 			)
@@ -68,7 +69,7 @@ class PolicyRepository {
 
 	public function findById( int $id ): ?Policy {
 		$row = $this->db->get_row(
-			$this->db->prepare( "SELECT * FROM {$this->table} WHERE id = %d", $id )
+			$this->db->prepare( 'SELECT * FROM %i WHERE id = %d', $this->table, $id )
 		);
 
 		return $row ? Policy::fromRow( $row ) : null;
@@ -76,7 +77,7 @@ class PolicyRepository {
 
 	public function findBySlug( string $slug ): ?Policy {
 		$row = $this->db->get_row(
-			$this->db->prepare( "SELECT * FROM {$this->table} WHERE slug = %s", $slug )
+			$this->db->prepare( 'SELECT * FROM %i WHERE slug = %s', $this->table, $slug )
 		);
 
 		return $row ? Policy::fromRow( $row ) : null;