havm 0.2.0

v0.2.0

Breaking changes

• Bridge networking is now the default. The VM gets a LAN-reachable IP
  for mDNS discovery (homeassistant.local) and local integrations. Self‑compiled
  binaries without the com.apple.vm.networking entitlement automatically fall
  back to NAT with a warning. Explicit type: nat in config.yml overrides as
  before.

Added

• havm_disk_usage_bytes Prometheus gauge. Tracks the main disk image's
  logical (configured) and allocated (actual APFS) size. Computed on scrape,
  no timer overhead.

Changed

• Event-driven idle — zero polling, zero run-loop drain. After guest boot
  completes, no GCD timers, no CFRunLoopRun, no run(mode:before:). Signals
  and VZ delegate callbacks arrive through GCD dispatch sources. VM stop is
  detected via VZVirtualMachineDelegate instead of state polling.

• GitHub API requests use ETag conditional caching. Persists the ETag
  between runs; subsequent requests return 304 Not Modified which costs zero
  rate-limit tokens. Only counts against the rate limit when a new HA OS
  release is actually published.

• Rate-limited errors show the reset time. The x-ratelimit-reset Unix
  timestamp is parsed and translated into a human‑readable duration
  ("try again in 6m 24s").

Fixed

• Setup errors use the structured logger instead of raw fputs to stderr,
  matching the log format configured for the session.