feat(api): bulk apply reconciles Schedule documents

[jhgaylor]

A Schedule document declares a cron that runs a teammate with a prompt. It
is keyed by the document name under its teammate, and carries the
TeamScheduleCreateRequest fields, so it goes through
Fountain.Team.Schedules and an invalid cron fails with the create route's
own changeset error.

The one thing that needed a decision: a teammate's name is its conversation's
title, or its agent's name, and neither is unique. A name two of the tenant's
teammates answer to resolves to :ambiguous and fails the Schedule row that
used it, rather than binding to whichever the roster listed last. A name this
manifest reconciled is unique among the documents and wins over the tenant's.

The roster read is skipped entirely when the manifest holds no schedules,
because listing the team is several queries.

Seventh of eight PRs toward #1636. #1675 is the combined branch and stays open
as the reference until the stack is in.

Validation: mix precommit, go test ./... in cli/, the SDK contract check
and the TypeScript verifier.

---

The stack (each PR is based on the one above it; review and merge top down):

1. stack/1680-unchanged-verdict — a save that changes nothing records nothing (Bulk apply reports updated for a document that changed nothing, so a client cannot tell a no-op from a write #1680)
2. stack/1636-apply-isolation — a raise in one apply document fails that row
3. stack/1636-cotenant-identity — a co-tenant follows a replacement only if it declared the same identity
4. stack/1636-update-teammate — Team.update_teammate/4
5. stack/1636-cli-group-by-kind — CLI: group apply documents by kind
6. stack/1636-teammate-kind — apply reconciles Teammate documents
7. stack/1636-schedule-kind — apply reconciles Schedule documents ← this one
8. stack/1636-webhook-kind — apply reconciles Webhook documents (Bulk apply: accept Teammate, Schedule and Webhook documents so one manifest reconciles the whole estate #1636)

🤖 Generated with Claude Code

https://claude.ai/code/session_01WQyc3wWWDAeZJE1Vr6etQa

[jhgaylor]

Labelled sdk-no-release. This PR regenerates sdk/contract/contract.json and the TypeScript types but leaves the version alone on purpose: the whole stack publishes once, from #1806, as 1.24.0. Four intermediate releases for one feature would each describe a half-finished apply vocabulary, and latest would move three times on the way there.