v0.6.2

Upgrading from v0.6.1 can use a rolling update.

• A Durable Object stub.fetch() that a peer forwards now rejects when the handler fails on the owner, as it does locally, and the handler does not run again.
• A Worker that returns a WebSocket response to a request without Upgrade: websocket now fails with a TypeError and a 500.
• celld dev accepts export NAME=value lines and multi-line quoted values in .env files, and skips an entry that cannot be a binding with a warning.
• Epoch GC (CELLD_LTX_RETENTION_SECS) also runs on nodes with bucket durability.
• LTX capture recovers a torn WAL header when a database opens, so capture no longer skips commits after a crash.
• A failed or abandoned eviction no longer stops compaction for the rest of a cell's activation.

Issues fixed:

• #243: celld dev reads .env and .env.local when there is no .dev.vars, as wrangler dev does.
• #245: A fleet with one follower recruits a second one when a peer becomes available.
• #246: Follower disk use stays bounded after a snapshot eviction or a deleted facet.
• #247: self is defined in Worker, Durable Object, and Worker Loader isolates.
• #248: getDurableObjectClass() accepts a plain class that extends no runtime base.
• #252: WebSockets work in Durable Object facets, including outbound sockets that a facet opens.
• #255: A deploy no longer deadlocks a Durable Object handler.
• #257: A fetch to a loaded Worker honors the caller's AbortSignal, including AbortSignal.timeout().