ci(psalm): trigger CI on psalm config and baseline changes

psalm*.xml and build/psalm-baseline*.xml were missing from the
paths-filter, so PRs touching only those files would skip all
Psalm jobs.

Assisted-by: Claude:claude-sonnet-4-6
Signed-off-by: Christoph Wurst <1374172+ChristophWurst@users.noreply.github.com>

Author: ChristophWurst

.github/workflows/static-code-analysis.yml

@@ -43,6 +43,8 @@ jobs:
               - 'vendor-bin/**'
               - 'composer.json'
               - 'composer.lock'
+              - 'psalm*.xml'
+              - 'build/psalm-baseline*.xml'
               - '**.php'
 
   static-code-analysis: