feat(BA-6644): Add domain id, resource group id in session row

[seedspirit]

Summary

• Add nullable domain/resource group id columns to sessions and backfill existing rows.
• Populate session scope ids across session, registry, model-serving, and deployment enqueue paths.
• Keep resource group name compatibility while adding resource_group_id request support.

Test plan

• pants fmt --changed-since=HEAD~1
• pants fix --changed-since=HEAD~1
• pants lint --changed-since=HEAD~1
• pants check --changed-since=HEAD~1
• pants test --changed-since=HEAD~1
• push hook lint/check/test on origin/main..HEAD

Resolves BA-6644

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📚 Documentation preview 📚: https://sorna--12452.org.readthedocs.build/en/12452/

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📚 Documentation preview 📚: https://sorna-ko--12452.org.readthedocs.build/ko/12452/

[Copilot]

Pull request overview

This PR denormalizes ownership/placement identifiers onto session rows by adding nullable domain_id and resource_group_id columns to the sessions table, backfilling existing rows, and propagating these IDs through every session-enqueue path (interactive sessions, registry, model-serving dry-run, and deployment enqueue). It also extends the v2 GraphQL/REST EnqueueSessionInput with a new resource_group_id field while deprecating the name-based resource_group, and changes pick_default_resource_group to return a combined id+name identifier.

Changes:

• Add domain_id/resource_group_id columns + Alembic migration (ada41cb881bb) with backfill and indexes.
• Resolve and populate domain/resource-group IDs in the session, registry, model-serving, and deployment scope-building flows; introduce ResourceGroupIdentifier and new id-by-name repository lookups.
• Add a resource_group_id request field (GQL/REST DTO) and deprecate resource_group, with schema docs updated.

Reviewed changes

Copilot reviewed 29 out of 29 changed files in this pull request and generated 3 comments.

Show a summary per file

File	Description
models/alembic/versions/ada41cb881bb_add_session_scope_id_columns.py	New migration adding/backfilling the two ID columns and indexes
models/session/row.py	Adds domain_id/resource_group_id ORM columns (uses bare GUID for typed columns)
services/session/service.py	Resolves domain/RG IDs during enqueue; RG selection still gated on the deprecated name
services/session/actions/enqueue_session.py	Adds resource_group_id to the resource spec
services/model_serving/services/model_serving.py	Builds session scope with resolved domain/RG IDs
registry.py	Builds session scope with resolved domain/RG IDs
repositories/scheduler/repository.py / db_source/db_source.py	New get_domain_id_by_name/get_resource_group_id_by_name; pick_default_resource_group returns identifier
repositories/scheduler/types/session_creation.py	New ResourceGroupIdentifier; AllowedScalingGroup gains typed id/name
repositories/deployment/db_source/db_source.py	Resolves and threads domain/RG IDs into DeploymentContext
repositories/scheduler/creators.py	Persists domain_id/resource_group_id on the row
data/session/spec.py, draft.py, creation.py	Adds id fields to scope/draft/deployment-context models
sokovan/deployment/deployment_draft_builder.py	Passes context IDs into the session scope draft
api/gql/session/types.py, api/adapters/session/adapter.py, dto/.../session/request.py	Adds resource_group_id input field, deprecates resource_group, maps it into the action
docs/manager/graphql-reference/*.graphql	Schema docs for the new/deprecated input fields
tests/..., changes/12452.feature.md	Updates fixtures/assertions for new repos and identifier types; changelog

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[seedspirit]

I wrote it this way because this method is used in only one place, and since it will be removed during future refactoring based on the ID, I didn't wrap it in a separate data class or split it into two methods.

[HyeockJinKim]

Is this used?