Blob fix, HTTP correctness, and crash patches

Blob content_type ownership is now encoded safely (1de8bd3)

Bun’s Blob implementation now tracks whether type bytes are static or heap-owned in the type itself, eliminating the old raw-pointer + boolean scheme that could mis-free a static MIME pointer. This fixes a real ASAN-reported crash in nested Blob construction and tightens ownership across Blob-related request/response codepaths.

Fetch/Request now treat signal: null as an explicit detach (17df034)

new Request(input, { signal: null }) and fetch(input, { signal: null }) now correctly sever inheritance from the input Request’s AbortSignal instead of silently falling back to it. The change also makes non-AbortSignal values throw a proper type error, matching WebIDL/spec expectations and fixing surprising abort behavior.

Bun.serve now honors Connection: close on responses (2bffc92)

When a handler sends Connection: close, Bun now marks the underlying HTTP response state so the socket is actually closed after the response instead of being reused. This fixes a protocol violation that could leave a connection alive in the keep-alive pool and serve extra requests after it should have been shut down.

Chunked HTTP handling no longer panics when the body buffer is absent (1081434)

The chunked-response path now falls back safely when body_out_str is missing instead of unwrapping None, avoiding the crash behind the chunked response retry bug. The retry path was also tightened so terminal requests simply stop early when there is no owner buffer to write into.

Linux set*id calls are protected against thread-suspension deadlocks (5260a43)

process.setuid, seteuid, setgid, setegid, and setgroups now run with thread suspension disabled on Linux to avoid the GC/bmalloc signal-barrier deadlock that could wedge the entire process. This is a serious reliability fix for privilege-dropping servers and any code that switches credentials under GC pressure.

Other misc changes

• HTTP fetch proxy URL handling now accepts URL objects.
• WebSocket upgrade sockets now emit close when the peer closes.
• UDP recvmmsg batches stop dispatching after a handler closes the socket.
• If-None-Match parsing now respects commas inside quoted ETags.
• Buffer raw slice/write bindings were aligned with Node semantics.
• FileSink async write promises now resolve to the correct byte count.
• process uncaught-exception behavior and fake timers were adjusted.
• Docs fact-check sweep across 120 pages.
• Test suite speedups and assorted CI/release-script tweaks.
• Dependency/build/test maintenance commits.