feat(core): add platform_account creation API

[maverox]

Type of Change

• Bugfix
• New feature
• Enhancement
• Refactoring
• Dependency updates
• Documentation
• CI/CD

Description

Precursor PR

#6882 (This PR has the context of platform merchant account and initial code changes).

Enabling the platform account.

• New API has been created to enable platform account.
• API requires JWTAuth with OrganizationAccountWrite permissions.
• Once enabled, there is no way of disabling platform account as of now.

---

changed list api for org and merchant to include platform context.

Additional Changes

• This PR modifies the API contract
• This PR modifies the database schema
• This PR modifies application configuration/environment variables

Motivation and Context

#7210

How did you test it?

1. Create a merchant account(m1).
2. Use below api to convert it into platform account.

curl --location '<BASE_URL>/user/platform' \
--header 'Content-Type: application/json' \
--header 'Authorization: Bearer <TOKEN>' \
--data '{
    "merchant_id": "merchant_xxxxxxxxx"
}'

3. Create another merchant account in the same organisation(m2).
4. Do a payment using platform's(m1) API key for connected merchant account(m2) by passing header x-connected-merchant-id with value as connected merchant account's merchant id.
5. Check if payment is created for connected merchant account.
6. Check if platform_merchant_id is populated with platform's merchant id.

Checklist

• I formatted the code cargo +nightly fmt --all
• I addressed lints thrown by cargo clippy
• I reviewed the submitted code
• I added unit tests for my changes where possible

[semanticdiff-com]

Review changes with  

Changed Files

File	Status
crates/router/src/routes/lock_utils.rs	35% smaller
crates/router/src/core/user.rs	12% smaller
crates/api_models/src/user.rs	0% smaller
crates/diesel_models/src/organization.rs	0% smaller
crates/diesel_models/src/schema.rs	0% smaller
crates/diesel_models/src/schema_v2.rs	0% smaller
crates/router/src/core/errors/user.rs	0% smaller
crates/router/src/db/organization.rs	0% smaller
crates/router/src/routes/app.rs	0% smaller
crates/router/src/routes/user.rs	0% smaller
crates/router_env/src/logger/types.rs	0% smaller
migrations/2025-01-07-081829_add_new_col_platform_merchant_id_in_organization_table/down.sql	Unsupported file format
migrations/2025-01-07-081829_add_new_col_platform_merchant_id_in_organization_table/up.sql	Unsupported file format