Service and DAO implementation for organization meta attributes GET API

[HasiniSama]

Purpose

Related to: wso2/product-is#20611

To support the frontend implementation requiring backend API support to filter and return meta attributes belonging to a specific organizational hierarchy level.

Approach

• API Support Layer Update: Implemented new getOrganizationsMetaAttributes Organization Manager service for filtering and returning meta attributes for specific organizational hierarchy levels. Filtering uses the same expression node tree building as getOrganizations.
• DAO Layer Update: Added a getOrganizationsMetaAttributes method in DAO implementation for retrieving organization meta attributes.

Release note

Feature: Added a new GET API endpoint /meta-attributes to filter and return meta attributes.
Description: This feature allows users to filter and retrieve meta attributes specific to a certain organizational hierarchy level.

Documentation

Automation tests

• Unit tests

  Added for both the Service layer and DAO layer.

• Integration tests

Security checks

• Followed secure coding standards in http://wso2.com/technical-reports/wso2-secure-engineering-guidelines? yes
• Ran FindSecurityBugs plugin and verified report? yes
• Confirmed that this PR doesn't commit any keys, passwords, tokens, usernames, or other secrets? yes

Related PRs

Test environment

JDK version: 11.0.23
Product Version: IS 7.0.1

[HasiniSama]

Closing this PR due to forced push changes in branch extending_org_search_feature that may affect this branch. The forced push commit changes that unintentionally appeared in this PR's diff. Will create a new PR.