v0.9.19

## Features

- feat(changelog): publish the Nebius model update (#8924)
- feat(library): add Stripe billing and failed-payment agent guide
- feat(library): add Stripe payment automation and alert guide
- feat(library): How Do You Build a HubSpot AI Agent for Lead Enrichment and Follow-Up? (#8907)
- feat(library): How Do You Build an AI Agent That Answers Questions From Confluence? (#8919)
- feat(library): AI Agent Version Control and Rollback: Platforms, Process, and Enterprise Checklist (#8918)
- feat(library): How Do You Control AI Agent Spend Across Teams? (#8917)

## Improvements

- perf(tables): read a sorted view's order once per drain and project selected columns in SQL (#8915)
- perf(mothership): stop re-reading and over-serving chat transcripts (#8914)
- perf(logs): order public log pages on an indexed column and retire a superseded document index (#8913)

## Bug Fixes

- fix(chat): name stackless error subclasses and compact stored unfinished tool params (#8928)
- fix(google-chat): avoid unchanged transcript reindexing (#8925)
- fix(files): refuse an unknown file per read instead of blanking the Chat tool result (#8922)
- fix(sandbox): name a failed Function's error from its headline, not an inspected property (#8921)
- fix(google-chat): preserve complete bounded syncs

## Other Changes

- docs(changelog): record completed editorial and media review (#8927)
- docs(library): update what-is-an-agentic-workflow (#8920)

## Contributors

- @icecrasher321
- @waleedlatif1

[View changes on GitHub](https://github.com/simstudioai/sim/compare/v0.9.18...v0.9.19)