v0.28.2

Package and dependency operations now consistently use HTTP CONNECT proxies.
Linux release artifacts also target glibc 2.28 for older distro compatibility.

Compiler & Build

• Avoid arm64 parser crashes in concurrent builds by compiling Acton.Parser
  without GHC full-laziness floating, keeping parser closures local to each
  parse while preserving parser and compiler concurrency. [#2964]

Packages & Distribution

• Use a common proxy-aware HTTP path for dependency downloads, package
  metadata, package index updates, and archive rehashing, so acton install,
  acton pkg add, acton pkg upgrade, and acton zig pkg add work behind
  HTTP CONNECT proxies. [#2963]
  • Earlier proxy fixes were spot solutions and not universal.
  • Network failures use the same proxy diagnostic instead of leaking raw
    http-client request records, and connection-level proxy failures fail
    fast while server-side rate-limit and transient errors still retry.
  • The proxy regression harness covers package index updates and package
    upgrades in addition to dependency archive downloads.
• Target glibc 2.28 for Linux release builds on both x86_64 and aarch64,
  using the Makefile's pinned Zig glibc target instead of deriving it from the
  builder container. [#2959]
  • Compiler-linked static dependencies such as zlib, GMP, and tinfo must come
    from Acton's bdeps/out tree, so missing build-time archives fail clearly
    instead of falling back to host libraries built for a newer libc.