feat: PRO-2395 Design doc for sponsorship policy management

[kanthgithub]

Sponsorship Policy Management

Arka needs to have the ability to setup sponsorship policies, these will be offered as a backend API within Arka and this can be consumed by our developer dashboard.

Description

• Migrate the Database from sqllite to postgres
• refactor backend code to use sequelize (orm) framework
• add sequelize models, migration scripts for all existing tables (config, api_key)
• refactor the routes, add data repository typescript functions for db calls
• remove native sql executions
• SponsorshipPolicy sequelize models, migration scripts, repository functions
• new route with API functions for CRUD operations on Sponsorship Policy
• admin_frontend, frontend repository changes needed to accomodate/decouple the database column references in UI
• docker file changes for new configuration variables of postgres database
• new docker file in backend to run postgres on local docker and usage guide for testing on local machine

Types of changes

• Design Doc

• implementation (feature)

• [ X] New feature (non-breaking change which adds functionality)

• Documentation Update

[linear]

PRO-2395 Arka sponsorship policies

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