RISDEV-6305 Persist keywords

[andreas-deazevedo]

Thread safety backend

Creation of documentation unit is finally thread safety by:

• New document_number table which is used to store the latest document number per year. Reading with a pessimistic write lock assures thread safety
• Wrapping the creation process with Spring Retry, so that even there is no document number stored, concurrent threads can retry the creation after a unique constraint exception

Persisting keywords

• Connect Pinia store
• Add e2e test without mock

Miscellaneous

• Update Prettier in build.gradle.kts causes formatting changes
• Normalize testId and labels for ListInputDisplay.vue
• Exclude spotlessCheck from Backend Build Github Action as two actions fail on formatting/linting issues