feat: add PATCH /v1/users/{id} to update user profile

[iamkalio]

Summary

• Adds PATCH /v1/users/{user_id} (GlobalID) to partially update users: username, password, and role (role changes admin-only; non-admins may only update themselves).
• Admins may update another user’s username, password, and role; authenticated non-admins may PATCH only their own id for username/password (password change requires current_password).
• Aligns behavior with existing GraphQL user mutations (e.g. patch_user / self-service constraints): LOCAL password rules, OAuth2/basic-auth guards, default admin protections, token logout on sensitive updates where applicable.
• Regenerates OpenAPI (schemas/openapi.json) and phoenix Python/TS client types from the new operation.
• Integration tests: admin username patch, member forbidden on other user, empty body → 422; launch/OpenAPI route coverage helpers updated as needed.

Fixes #12269

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commit: 7defa0c

[iamkalio]

Hello @mikeldking
I've had this for a while too, looking forward to your review when you have the time