v3.14.2 — pibox v0.11.2 + provider audit

Two-commit release:
  - 66b7d3b: CHANGELOG entry + docker-compose.yml (pibox image tag
    v0.11.1→v0.11.2, LIBRECHAT_TITLE_MODEL default, PIBOX_ZAI_DEBUG
    env wire). Landed under a stale "v3.14.1" commit message; this
    tag annotation is the canonical record of what shipped.
  - HEAD:   provider yaml audits (Groq, Cerebras, OpenRouter),
    fallbacks.json purge, doc sync (providers.md, services/librechat.md,
    services/browser.md, README.md, .env.example, .gitignore).

PIBOX v0.11.1 → v0.11.2 (tracks aicodebox v0.10.0):
  - Schema-mode retries on /openai/v1/chat/completions no longer
    replay the full original prompt. Base allocates ephemeral
    /tmp/aicodebox/<uuid>/ workspace (mode 0o700, cleaned in
    finally) and session-continues the retry conversation with
    minimal corrective prompt (error + directive + schema, ~1.5k
    tokens). 100k-token request needing 3 retries: 400k → ~105k
    input tokens.
  - PiAdapter contract unchanged. /run callers unchanged. Wire
    shape on /openai/v1/chat/completions unchanged.

PROVIDER AUDIT — REMOVED (dead / sunset-flagged):
  Groq:    groq-llama-3.1-8b, groq-llama-3.3-70b, groq-llama-4-scout,
           groq-qwen3-32b, groq-kimi-k2
  Cerebras: cerebras-qwen3-235b, cerebras-llama-3.1-8b
  OpenRouter: or-minimax-m2.5

PROVIDER AUDIT — RENAMED model fields:
  groq-compound:      groq/compound-beta → groq/compound
  groq-compound-mini: groq/compound-beta-mini → groq/compound-mini

PROVIDER AUDIT — ADDED:
  groq-qwen3.6-27b, groq-gpt-oss-safeguard-20b,
  or-nemotron-ultra-550b, or-nemotron-nano-9b, or-nemotron-nano-30b

CONFIG HYGIENE:
  fallbacks.json: 106 → 98 chains (purged refs to removed aliases).
  LIBRECHAT_TITLE_MODEL default: groq-llama-3.3-70b → groq-gpt-oss-120b.

HEADS-UP: psyb0t/pibox:v0.11.2 + psyb0t/aicodebox:v0.10.0 may not
be on Docker Hub at this tag's cut moment.