check:generated fails on dev: ScheduleValidationError missing literal discriminator #245

What happened

bun run check:generated (part of the unit (linux)/unit (windows) CI jobs) fails with:

error: Promise error must have a literal discriminator: server.schedule.schedule.create
    at assertPromiseEndpoint (packages/httpapi-codegen/src/index.ts:296:13)

This was masked on dev until now because CI was failing earlier, at the formatMinutes unit-test step (see #236/#237), so check:generated never ran far enough to reach this. Once that's fixed, this surfaces on every PR.

Root cause

ScheduleValidationError in packages/protocol/src/groups/schedule.ts is missing the literal discriminator field (name or _tag) that httpapi-codegen's declaredErrorFields() requires on every HttpApi error class:

export class ScheduleValidationError extends Schema.ErrorClass<ScheduleValidationError>("ScheduleValidationError")(
  { message: Schema.String },
  { httpApiStatus: 400 },
) {}

Every sibling error class (e.g. ProjectCopyError in packages/protocol/src/groups/project-copy.ts) declares name: Schema.Literal("<ClassName>") as a field. ScheduleValidationError is the one outlier.

Fix

Add the name literal field to ScheduleValidationError, and pass name: "ScheduleValidationError" at both construction sites in packages/server/src/handlers/schedule.ts (matches the ProjectCopyError pattern exactly).