Asimov v0.9.0-beta.2

First release under the project's new home, AsimovMac/asimov
— the original stevegrunwell/asimov
repository transferred to a dedicated organization (stars, history, and the old
URL preserved via GitHub's redirect). Folds in all fork work from v0.4.0 through
v0.8.0. Shipped as a pre-release for testing first.

Added

• Go's module cache (~/go/pkg/mod) is now one of the built-in global caches (opt-in via [fixed_dirs] enabled = true). Excluding the cache root covers every dependency inside it in a single tmutil call, instead of attempting each vendor/ directory individually (~11s apiece, and doomed — see below). Using a custom GOPATH? Add it with [fixed_dirs] extra

Changed

• Project home is now AsimovMac/asimov; release tooling, README, and install
  scripts retargeted accordingly

Fixed

• Read-only directories are now detected and skipped up front with a clear read-only, cannot be excluded message, instead of burning ~11s on a tmutil addexclusion call that can never succeed. A Time Machine exclusion is stored as an extended attribute on the item itself, so a 0555 directory can never take one — Go's module cache is deliberately read-only, which is why its vendor/ directories always failed
• tmutil's POSIXError(_nsError: …Code=22 "Invalid argument") dump no longer leaks into Asimov's output. tmutil prints it to stdout (not stderr), so the existing 2>/dev/null never suppressed it; both streams are now silenced and Asimov prints its own warning instead
• Corrected a long-standing misdiagnosis in the code comments: these failures were attributed to the @ in Go module version paths. @ is irrelevant — a writable path containing @ excludes fine. Read-only permissions were always the cause (regression tests now cover both)