v0.5.1

Upgrading from v0.5.0 can use a rolling update. Stop one node, wait for its
replacement to report healthy, then continue to the next node.

Highlights:

- Dynamic Workers can enforce CPU time and subrequest limits from
  `WorkerCode.limits` or a `getEntrypoint()` call.
- Dynamic Workers can send Tail Workers an invocation report with the request,
  response, console logs, exception, and outcome.
- The new `celld r2` CLI tool can put, get, list, inspect, and delete objects
  behind an `r2_buckets` binding without a running node. It preserves the
  binding's object metadata.
- `celld deploy` accepts Wrangler `define` values and `rules` for Text, Data,
  and CompiledWasm modules when it bundles a Worker.
- KV accepts a `ReadableStream` value in `put()`. It checks the value-size
  limit while reading the stream.
- The node caps its LTX writer and read-lock SQLite page caches, and returns
  freed C allocator pages before it measures memory pressure.
- Compaction can read retained LTX bundles after their segments leave the
  in-memory index, so a slow cell can continue draining its history.
- The `/evict/<cell>` operator route reports a refusal, cancellation, or
  failure instead of returning success before the eviction completes.
- `/state` reports isolate counts and V8 and allocator memory counters.
- Node.js compatibility improves for mutable built-in modules and the
  `process` fields that dependencies read during module loading.

Issues fixed:

- #204: `KeyObject.toCryptoKey()` honors the requested algorithm, key usages,
  and extractability, so valid RSA keys can sign with `jose`.
- #209: R2 writes work with Azure Blob Storage metadata-name rules.

Co-authored-by: Josh Collinsworth <joshuajcollinsworth@gmail.com>
Co-authored-by: Kyle Kelley <rgbkrk@gmail.com>
Co-authored-by: Nathan Whitaker <17734409+nathanwhit@users.noreply.github.com>
Co-authored-by: Ryan Dahl <ry@tinyclouds.org>
Co-authored-by: Yusuke Tanaka <yusuktan@maguro.dev>