fix: apply operator_linebreak cs-fixer rule and fix phpstan warnings

- Fix operator_linebreak style in AbstractToken.php
- Fix implicitly nullable parameters in PluginSessionTest.php
- Fix array.invalidKey phpstan ignore in SSODataTest.php

Co-Authored-By: Opencode <opencode@noreply.opencode.ai>
Co-Authored-By: GitHub Copilot <copilot@noreply.github.com>

Author: 3 people

src/AbstractToken.php

@@ -157,9 +157,9 @@ public static function base64ToPEMPublicKey(string $data): string
         }
 
         return
-            "-----BEGIN PUBLIC KEY-----\n" .
-            chunk_split($data, 64) .
-            "-----END PUBLIC KEY-----\n";
+            "-----BEGIN PUBLIC KEY-----\n"
+            . chunk_split($data, 64)
+            . "-----END PUBLIC KEY-----\n";
     }
 
     /**

test/PluginSessionTest.php

@@ -78,7 +78,7 @@ public function tearDown(): void
     /**
      * @return void
      */
-    private function setupEnvironment(string $queryParamPid = null, string $queryParamJwt = null, bool $clearSession = true): void
+    private function setupEnvironment(?string $queryParamPid = null, ?string $queryParamJwt = null, bool $clearSession = true): void
     {
 
         $_REQUEST[PluginSession::QUERY_PARAM_PID] = $queryParamPid;

test/SSOData/SSODataTest.php

@@ -51,7 +51,7 @@ public function testAccessorsGiveCorrectValues(): void
     public function testIsEditorReturnsCorrectValues(): void
     {
         $map = [
-            /** @phpstan-ignore array.duplicateKey */
+            /** @phpstan-ignore array.invalidKey, array.duplicateKey */
             null => false,
             '' => false,
             'use' => false,