Add 'dataschemaversion' field to letter request schemas and update ve… #117

Job	Run time
Set CI/CD metadata	4s
Commit stage / Scan secrets	10s
Commit stage / Check file format	9s
Commit stage / Count lines of code	7s
Commit stage / Check Markdown format	5s
Commit stage / Scan dependencies	37s
Commit stage / Check English usage	8s
Commit stage / Check TODO usage	7s
Commit stage / Check for changes to event schema package compared to main branch	6s
Commit stage / Check event schema version has been updated	4s
Test stage / Typecheck	24s
Test stage / Unit tests	53s
Test stage / Check generated dependencies	26s
Test stage / Linting	1m 5s
Test stage / Perform static analysis	5s
Test stage / Test coverage	7s
Build stage	-1s
Acceptance stage	-1s
	4m 35s

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