Dynamic json body variables

[ruwinirathnamalala]

#978

This pull request introduces improvements to how dynamic variable expressions are handled in service assignments and endpoint bodies, as well as fixes to the service testing workflow to ensure state consistency. The changes aim to make variable interpolation more robust, prevent parsing errors, and avoid stale state issues during service testing.

Variable interpolation and parsing improvements:

• Added the normalizeAssignValue function in service-builder.ts to strip unnecessary String() wrappers from API response variables in assignment expressions, ensuring correct handling by downstream parsers.
• Updated raw JSON body parsing in both handleEndpointStep (service-builder.ts) and getEndpointBody (new-services.store.ts) to wrap unquoted ${...} expressions in quotes before parsing, preventing JSON parsing errors when dynamic variables are used. [1] [2]

Service testing workflow fixes:

• Modified runServiceTest in service-tester.ts to clear previous test states before running a new test, and to re-fetch the latest nodes from the store to avoid using stale snapshots, ensuring accurate validation of node states during repeated tests. [1] [2]

[sonarqubecloud]

Quality Gate failed

Failed conditions
C Maintainability Rating on New Code (required ≥ A)

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