fix: CI test failures — metadata key, cli console, docker env, vision order

Fixes 9 test failures on current main, incorporating ideas from PR stack
#6219-#6222 by xinbenlv with corrections:

- model_metadata: sync HF context length key casing
  (minimaxai/minimax-m2.5 → MiniMaxAI/MiniMax-M2.5)

- cli.py: route quick command error output through self.console
  instead of creating a new ChatConsole() instance

- docker.py: explicit docker_forward_env entries now bypass the
  Hermes secret blocklist (intentional opt-in wins over generic filter)

- auxiliary_client: revert _read_main_provider() to simple
  provider.strip().lower() — the _normalize_aux_provider() call
  introduced in 5c03f2e7 stripped the custom: prefix, breaking
  named custom provider resolution

- auxiliary_client: flip vision auto-detection order to
  active provider → OpenRouter → Nous → stop (was OR → Nous → active)

- test: update vision priority test to match new order

Based on PR #6219-#6222 by xinbenlv.

agent/model_metadata.py

@@ -136,7 +136,7 @@ DEFAULT_CONTEXT_LENGTHS = {
     "deepseek-ai/DeepSeek-V3.2": 65536,
     "moonshotai/Kimi-K2.5": 262144,
     "moonshotai/Kimi-K2-Thinking": 262144,
-    "minimaxai/minimax-m2.5": 1048576,
+    "MiniMaxAI/MiniMax-M2.5": 1048576,
     "XiaomiMiMo/MiMo-V2-Flash": 32768,
     "mimo-v2-pro": 1048576,
     "mimo-v2-omni": 1048576,