chore: remove unused deployment scripts and update AVM post-deployment guide

[Abdul-Microsoft]

Purpose

• This pull request updates the post-deployment process for setting up PostgreSQL and related documentation. The main focus is on simplifying and consolidating the table creation process into a single post-deployment script, and updating the documentation to reflect these changes. Several scripts used for credential management and table creation have been removed, and the documentation now emphasizes running a unified setup script after deployment.

Documentation updates:

• Updated the post-deployment guide (AVMPostDeploymentGuide.md) to instruct users to run a single post-deployment setup script for configuring the Function App client key and creating PostgreSQL tables, streamlining the previous multi-step process. Steps for authentication and accessing the admin/chat apps have been renumbered accordingly. [1] [2]
• Revised the PostgreSQL integration documentation (postgreSQL.md) to clarify that table creation is handled by a single post-deployment script, replacing references to automated table creation during infrastructure deployment. The benefits section now highlights the simplified, script-based setup. [1] [2]

Script and code cleanup:

• Removed the azure_credential_utils.py script, which previously handled Azure credential acquisition for both sync and async environments.
• Deleted the create_postgres_tables.py script, which handled PostgreSQL table and index creation using Azure credentials.
• Removed the run_create_table_script.sh Bash script that managed firewall rules, requirements installation, and table creation script execution.

Does this introduce a breaking change?

• Yes
• No

How to Test

• Get the code

git clone [repo-address]
cd [repo-name]
git checkout [branch-name]
npm install

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