Adds VitA Specific NHS Number Mapping #444

Job	Run time
Set CI/CD metadata	5s
Commit stage / Scan secrets	20s
Commit stage / Check Markdown format	3s
Commit stage / Check file format	5s
Commit stage / Check English usage	8s
Commit stage / Scan dependencies	38s
Commit stage / Lint and validate OpenAPI	42s
Commit stage / Count lines of code	24s
Test stage / Unit tests	4s
Test stage / Linting	3s
Test stage / Perform static analysis	3s
Test stage / Test coverage	4s
Build stage	0s
Acceptance stage	0s
	2m 39s

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