v0.4.0

• feat(usage): local usage ledger (~/.glam/usage.jsonl) — every glam run records
  model, provider, tokens, real cost, duration, and per-model escalation splits; new
  glam usage command (totals, by day/model/provider, --since, --json, budget bar);
  opt-in monthly budget alerts ([usage] monthlyBudgetUsd / warnAtPct).
• feat(models): evergreen model/provider landscape — new glam models command over a
  built-in catalog (13 entries, live-verified prices with as-of dates and sources);
  --refresh pulls current provider prices, reports price drops, caches honestly;
  adapters price through the catalog so route/run/models can never drift.
• feat(adapters): DeepSeek V4 support — deepseek-v4-pro + deepseek-v4-flash on
  Fireworks (FP8, 1M context, live-verified incl. parallel tool calls, seed, and prompt
  caching) and DeepSeek-V4-Pro on Together (live pending key); adapter conformance
  63/63; Fireworks adapter now fails loud on unknown model ids.
• feat(cli): hardening/UX sweep — honest glam doctor inside compiled binaries
  (root-caused /$bunfs detection), real Ctrl-C interrupt (aborts in-flight provider
  request, honest partial cost, exit 130), numeric option validation, did-you-mean
  suggestions, NO_COLOR/FORCE_COLOR policy, EPIPE-safe piping, 2.3× faster startup.
• docs: context-wars messaging (README hero, WHY-WE-WIN), research briefs 24–25
  (creator-thesis update; provider/model landscape 2026-07 with cited prices).