v0.3.0

- v0.3.0 adds a replicated write-behind log. Fleets of two or more nodes
  acknowledge writes after peer fsync while bucket upload finishes later. In
  testing, this delivers 10× lower write latency and over 100× fewer Class A
  S3 operations. A v0.2.1 fleet can roll forward one node at a time.

- Added support for Azure Blob Storage (`az://<BUCKET_NAME>`).

- Added support for D1 databases, including the `celld d1` CLI for migrations
  and SQL execution.

- Added support for cron triggers, with durable fleet-wide scheduling, retries
  for failed handlers, and recovery of one missed run after downtime.

- Streaming and rewrapping request bodies are up to 70× faster, and text
  decoding is up to 44× faster.

- WebSocket upgrades now work correctly for Durable Object subrequests and
  cross-script service bindings.

- `setInterval()` now works correctly.

- `celld deploy` now accepts Node built-in specifiers (E.G. `node:util`)

- Each isolate now has a configurable V8 heap limit. celld refuses new
  hibernatable WebSockets and oversized SQL materialization near that limit,
  then resumes service after memory use falls.

- Correctness fixes prevent overlapping alarm handlers, events from resuming in
  freed isolates, lost transactions at replication segment boundaries, and
  database corruption after eviction and reactivation.

- Closed issues: [#139](https://github.com/denoland/celld/issues/139),
  [#144](https://github.com/denoland/celld/issues/144),
  [#147](https://github.com/denoland/celld/issues/147),
  [#149](https://github.com/denoland/celld/issues/149),
  [#150](https://github.com/denoland/celld/issues/150),
  [#152](https://github.com/denoland/celld/issues/152),
  [#154](https://github.com/denoland/celld/issues/154),
  [#155](https://github.com/denoland/celld/issues/155),
  [#156](https://github.com/denoland/celld/issues/156),
  [#157](https://github.com/denoland/celld/issues/157), and
  [#158](https://github.com/denoland/celld/issues/158).

Co-authored-by: Bartek Iwańczuk <biwanczuk@gmail.com>
Co-authored-by: Ben Plotnick <bplotnick@users.noreply.github.com>
Co-authored-by: Nathan Whitaker <17734409+nathanwhit@users.noreply.github.com>
Co-authored-by: Yusuke Tanaka <yusuktan@maguro.dev>
Co-authored-by: magurotuna <23649474+magurotuna@users.noreply.github.com>