feat(API): add name field to repo sync schema and create endpoint

[Phrase (phrase-bot)]

This PR was generated by the openapi-apply agent in response to a
/openapi-sync apply request on
Phrase-Engineering/strings-app#17811.

What changed in the API

• All RepoSync responses (GET /api/v2/repo_syncs, GET /api/v2/repo_syncs/{id}, POST /api/v2/repo_syncs, POST /api/v2/repo_syncs/{id}/activate, POST /api/v2/repo_syncs/{id}/deactivate) now include a name field (nullable string, max 100 characters). When blank, the sync's display name falls back to the associated project name, but the API field itself is null.
• POST /api/v2/repo_syncs now accepts an optional name parameter in the request body.

Source

• Originating strings-app PR: Phrase-Engineering/strings-app#17811
• Applied by: jablan

Notes for reviewers

• last_import_at and last_export_at were also marked nullable: true in schemas/repo_sync.yaml to accurately reflect that these fields can be null (no import/export has occurred yet). This aligns with the actual DB column being nullable.
• The openapi-generator-cli validate step in lint.sh could not run because Java is not installed in this CI environment — this is a pre-existing environment limitation, not introduced by these changes. swagger-cli validate main.yaml and make bundle both passed cleanly (exit code 0).
• doc/compiled.json was updated as a side effect of running make lint (via make bundle); this is expected.

---

Opened automatically by the openapi-apply agent. Review the spec changes
against the linked strings-app PR; the agent does not vouch for correctness
beyond "the YAML parsed and the documented layout was followed."

[github-actions]

API changelog (oasdiff)

Doc-only edits (descriptions, examples) do not appear here.

16 changes: 10 error, 0 warning, 6 info
error	[response-property-became-nullable] at doc/compiled.json
	in API GET /accounts/{account_id}/repo_syncs
		the response property `items/last_export_at` became nullable for the status `200`

error	[response-property-became-nullable] at doc/compiled.json
	in API GET /accounts/{account_id}/repo_syncs
		the response property `items/last_import_at` became nullable for the status `200`

error	[response-property-became-nullable] at doc/compiled.json
	in API POST /accounts/{account_id}/repo_syncs
		the response property `last_export_at` became nullable for the status `201`

error	[response-property-became-nullable] at doc/compiled.json
	in API POST /accounts/{account_id}/repo_syncs
		the response property `last_import_at` became nullable for the status `201`

error	[response-property-became-nullable] at doc/compiled.json
	in API GET /accounts/{account_id}/repo_syncs/{id}
		the response property `last_export_at` became nullable for the status `200`

error	[response-property-became-nullable] at doc/compiled.json
	in API GET /accounts/{account_id}/repo_syncs/{id}
		the response property `last_import_at` became nullable for the status `200`

error	[response-property-became-nullable] at doc/compiled.json
	in API POST /accounts/{account_id}/repo_syncs/{id}/activate
		the response property `last_export_at` became nullable for the status `200`

error	[response-property-became-nullable] at doc/compiled.json
	in API POST /accounts/{account_id}/repo_syncs/{id}/activate
		the response property `last_import_at` became nullable for the status `200`

error	[response-property-became-nullable] at doc/compiled.json
	in API POST /accounts/{account_id}/repo_syncs/{id}/deactivate
		the response property `last_export_at` became nullable for the status `200`

error	[response-property-became-nullable] at doc/compiled.json
	in API POST /accounts/{account_id}/repo_syncs/{id}/deactivate
		the response property `last_import_at` became nullable for the status `200`

info	[response-optional-property-added] at doc/compiled.json
	in API GET /accounts/{account_id}/repo_syncs
		added the optional property `items/name` to the response with the `200` status

info	[new-optional-request-property] at doc/compiled.json
	in API POST /accounts/{account_id}/repo_syncs
		added the new optional request property `name`

info	[response-optional-property-added] at doc/compiled.json
	in API POST /accounts/{account_id}/repo_syncs
		added the optional property `name` to the response with the `201` status

info	[response-optional-property-added] at doc/compiled.json
	in API GET /accounts/{account_id}/repo_syncs/{id}
		added the optional property `name` to the response with the `200` status

info	[response-optional-property-added] at doc/compiled.json
	in API POST /accounts/{account_id}/repo_syncs/{id}/activate
		added the optional property `name` to the response with the `200` status

info	[response-optional-property-added] at doc/compiled.json
	in API POST /accounts/{account_id}/repo_syncs/{id}/deactivate
		added the optional property `name` to the response with the `200` status