## Summary

- Bumps the `cloudglue-api-spec` submodule to **v0.7.4** ([api-spec
#98](cloudglue/cloudglue-api-spec#98)), which
marks the include-gated Grain `source_metadata` fields as nullable.
- Regenerates the client. The only generated change is in
`GrainSourceMetadata` (`generated/common.ts`): `participants`,
`highlights`, `ai_summary`, `ai_action_items`, `ai_template_sections`,
and `calendar_event` move from `.optional()` → `.nullish()`, with
matching `| null` TS types produced by the existing `generate.js`
nullish/nullable transforms.
- Bumps SDK version `0.7.12` → `0.7.13`.

## Verification

- `npm run generate` is reproducible — re-running yields byte-identical
output (only `common.ts` changes).
- `npm run build` (tsc) passes.
- Ran `getSourceMetadata()` against a live Grain connector: fetch + Zod
parse both succeed with the new nullable schema.

<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->

## Summary by CodeRabbit

* **Chores**
  * Version updated to 0.7.13
  * Submodule reference updated

<!-- end of auto-generated comment: release notes by coderabbit.ai -->

…#62)

## Summary

Regenerates the low-level SDK from
[cloudglue-api-spec#98](cloudglue/cloudglue-api-spec#98)
(API v0.7.4).

The only substantive change is in `GrainSourceMetadata`: include-gated
fields (`participants`, `highlights`, `ai_summary`, `ai_action_items`,
`ai_template_sections`, `hubspot`) are now nullable, with serializer
hooks so an explicit `null` round-trips instead of being dropped.
Everything else in the diff is the `0.7.3 → 0.7.4` version bump churn.

## Wrapper changes

None needed. The data-connector sync and source-metadata endpoints
landed previously (#60) and are already exposed via
`DataConnectors.get_source_metadata()` / `sync_file()`. The
source-metadata endpoint takes only `id`/`url` (no new params in #98),
so the lightweight wrapper is already complete.

## Verification

Built (`make build` → `cloudglue-0.7.11`) and ran a throwaway script
end-to-end against a live Grain connector:
- connector discovery, `list_files()`, and `get_source_metadata()` all
work
- nullable fields deserialize cleanly — `calendar_event`/`hubspot` come
back as `None` and round-trip through `to_dict()` as explicit `null`

🤖 Generated with [Claude Code](https://claude.com/claude-code)