feat: kubecon 2025 feature release

[Ash-exp]

Description

Fixes https://github.com/devtron-labs/sprint-tasks/issues/2526
Fixes https://github.com/devtron-labs/sprint-tasks/issues/2524

Checklist:

• The title of the PR states what changed and the related issues number (used for the release note).
• Does this PR requires documentation updates?
• I've updated documentation as required by this PR.
• I have performed a self-review of my own code.
• I have commented my code, particularly in hard-to-understand areas.
• I have tested it for all user roles.
• I have added all the required unit/api test cases.

Does this PR introduce a user-facing change?

Summary by Bito

• This pull request introduces a new feature that includes the creation of a database table named 'velero_installation_config' to track the installation status of Velero, which may introduce risks related to data management.
• This pull request introduces significant enhancements to the database schema, including the addition of new tables for chat messages, user recommendations, and chat graph data, as well as implementing a unique constraint on the runbook approval status table to prevent duplicate entries.
• This pull request introduces a new feature for Velero backup and restore functionality, including the creation of several new database tables and sequences, along with cleanup scripts to remove existing indexes and the velero_installation_config table.
• Overall, this pull request touches on database schema enhancements, including new tables for cost analysis, chat messages, and Velero functionality, and introduces potential risks related to data management.

[sonarqubecloud]

Quality Gate passed

Issues
6 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud