Remove completion_subscribers from Card shape

[robzolkos]

Summary

• Remove completion_subscribers from the Card shape in the Smithy spec
• Regenerate all language SDKs (Go, Ruby, TypeScript, Swift, Kotlin)
• Todos retain the field — this was card-only, where it always returned an empty array

Related PRs:

• basecamp/bc3#9967 — Remove from card API serializer
• Remove completion_subscribers from card API docs bc3-api#398 — Update API docs

---

Summary by cubic

Removed completion_subscribers from the Card shape in the Smithy spec, OpenAPI, and all SDKs. Cards never supported this field (it always returned an empty array); Todos still expose it.

• Migration
  • Remove any references to Card.completion_subscribers in your code.
  • Use Todo.completion_subscribers if you need completion subscribers.

^{Written for commit e2f72ad. Summary will update on new commits.}

[github-actions]

## Spec Change Impact

### Summary
The `completion_subscribers` field was removed from the `Card` shape.

### Impact
- **Removed Field**: `completion_subscribers` (from `Card` shape)
- **Breaking Change**: Yes (removal of a field constitutes a breaking API change)

### Required Actions
- All SDKs must be regenerated to reflect this change.

### Checklist of SDKs needing updates:
- [ ] Go
- [ ] TypeScript
- [ ] Ruby
- [ ] Kotlin
- [ ] Swift

[github-actions]

⚠️ Potential breaking changes detected:

• Removal of the 'completionSubscribers' field from the 'Card' type in multiple SDKs (Go, Kotlin, Swift, and TypeScript). This constitutes a breaking change as it is a removed exported field.

Review carefully before merging. Consider a major version bump.

[cubic-dev-ai]

No issues found across 13 files

[Copilot]

Pull request overview

Removes completion_subscribers from the Card shape in the Smithy/OpenAPI specs and propagates that removal through regenerated SDK artifacts and fixtures (keeping the field on Todo, where it still applies).

Changes:

• Removed completion_subscribers from the Card schema in Smithy and OpenAPI, plus TypeScript typings.
• Updated generated SDK models to drop the corresponding Card field (Go, Ruby, Kotlin, Swift, TypeScript).
• Updated card JSON fixtures to no longer include completion_subscribers.

Reviewed changes

Copilot reviewed 5 out of 13 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
spec/basecamp.smithy	Removes completion_subscribers from the Card structure.
openapi.json	Removes the Card schema property for completion_subscribers.
typescript/src/generated/openapi-stripped.json	Mirrors the OpenAPI change in the stripped artifact.
typescript/src/generated/schema.d.ts	Removes completion_subscribers from the Card TypeScript type.
go/pkg/generated/client.gen.go	Removes CompletionSubscribers from the generated Go Card model.
go/pkg/basecamp/cards.go	Removes CompletionSubscribers from the hand-wrapped Go Card model and its mapping from the generated type.
ruby/lib/basecamp/generated/types.rb	Removes Card’s completion_subscribers handling in Ruby generated types.
swift/Sources/Basecamp/Generated/Models/Card.swift	Removes completionSubscribers from the Swift Card model and initializer.
kotlin/sdk/src/commonMain/kotlin/com/basecamp/sdk/generated/models/Card.kt	Removes completionSubscribers from the Kotlin Card model.
spec/fixtures/cards/list.json	Removes completion_subscribers from card list fixture responses.
spec/fixtures/cards/get.json	Removes completion_subscribers from card get fixture response.
typescript/src/generated/metadata.json	Regeneration updates timestamp and adds ListLineupMarkers operation config.
ruby/lib/basecamp/generated/metadata.json	Regeneration updates timestamp and adds ListLineupMarkers operation config.

---

💡 Add Copilot custom instructions for smarter, more guided reviews. Learn how to get started.

You can also share your feedback on Copilot code review. Take the survey.

[robzolkos]

Closing as keeping the result shape after all https://github.com/basecamp/bc3/pull/9967