Ord-schema

What's Changed
* Add foreign keys to rdkit tables by skearnes in https://github.com/open-reaction-database/ord-schema/pull/702


**Full Changelog**: https://github.com/open-reaction-database/ord-schema/compare/v0.3.67...v0.3.68

What's Changed
* Update protocol complier usage because of protobuf updates by FanwangM in https://github.com/open-reaction-database/ord-schema/pull/700


**Full Changelog**: https://github.com/open-reaction-database/ord-schema/compare/v0.3.66...v0.3.67

What's Changed
* Fix problem of generating dataset when having `reaction_id` in the template (697) by FanwangM in https://github.com/open-reaction-database/ord-schema/pull/699

New Contributors
* FanwangM made their first contribution in https://github.com/open-reaction-database/ord-schema/pull/699

**Full Changelog**: https://github.com/open-reaction-database/ord-schema/compare/v0.3.65...v0.3.66

What's Changed
* Unique entries in rdkit tables by skearnes in https://github.com/open-reaction-database/ord-schema/pull/695


**Full Changelog**: https://github.com/open-reaction-database/ord-schema/compare/v0.3.64...v0.3.65

What's Changed
* Add unit conversion method to UnitResolver by connorcoley in https://github.com/open-reaction-database/ord-schema/pull/694


**Full Changelog**: https://github.com/open-reaction-database/ord-schema/compare/v0.3.63...v0.3.64

What's Changed
* Validation patch to change Compound Identifier strictness by connorcoley in https://github.com/open-reaction-database/ord-schema/pull/692


**Full Changelog**: https://github.com/open-reaction-database/ord-schema/compare/v0.3.62...v0.3.63