Event-model

What's Changed:
* Update schemas for StreamResource and StreamDatum by genematx in https://github.com/bluesky/event-model/pull/301. Introduced `uri`, `parameters`, and `mimetype` fields; removed `path_semantics` and `resource_kwargs`. More detail: https://github.com/bluesky/event-model/issues/296
* Bump peaceiris/actions-gh-pages from 3.9.3 to 4.0.0 by dependabot in https://github.com/bluesky/event-model/pull/303
* DOC: Fix the switcher URL by AlexanderWells-diamond in https://github.com/bluesky/event-model/pull/305

**Full Changelog**: https://github.com/bluesky/event-model/compare/v1.20.0...v1.21.0

Changed
-------

- Bumped from `pydantic 1.*` to `pydantic 2.*`

Fixed
-----

- Bug in `rechunk_event_pages` affecting Events with an empty `filled` key

Changed

Dropped support for jsonschema 2.*.

What's Changed
* Find schema files relative to source code, this allows tests to be ru… by clintonroy in https://github.com/bluesky/event-model/pull/282
* Rethinking external assets 2 by evalott100 in https://github.com/bluesky/event-model/pull/272

New Contributors
* clintonroy made their first contribution in https://github.com/bluesky/event-model/pull/282

**Full Changelog**: https://github.com/bluesky/event-model/compare/v1.19.7...v1.19.8

What's Changed
Patch to prevent pydantic 2 causing errors on the document TypedDicts and schema generation

* Fixed imports to avoid pydantic if the version is >=2 by evalott100 in https://github.com/bluesky/event-model/pull/281


**Full Changelog**: https://github.com/bluesky/event-model/compare/v1.19.6...v1.19.7

What's Changed
* Specified pydantic <2 by evalott100 in https://github.com/bluesky/event-model/pull/279


**Full Changelog**: https://github.com/bluesky/event-model/compare/v1.19.5...v1.19.6