fix: post deployment script

[Shreyas-Microsoft]

Purpose

This pull request refactors how registered schema IDs and names are tracked in the infra/scripts/post_deployment.sh deployment script. The main improvement is switching from space-separated strings to Bash arrays, which makes handling and iterating over these values more robust and less error-prone.

Refactoring of schema tracking variables:

• Changed REGISTERED_IDS and REGISTERED_NAMES from space-separated strings to Bash arrays for safer and more reliable handling.
• Updated all assignments to REGISTERED_IDS and REGISTERED_NAMES to use array append syntax instead of string concatenation. [1] [2]
• Refactored the loop that processes registered schemas to use array indexing, eliminating the need for manual index tracking and string manipulation.

Deployment output improvements:

• Added a summary line at the end of the script to print the total number of schemas registered, using the array length.

Does this introduce a breaking change?

• Yes
• No

Golden Path Validation

• I have tested the primary workflows (the "golden path") to ensure they function correctly without errors.

Deployment Validation

• I have validated the deployment process successfully and all services are running as expected with this change.

What to Check

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