When Bitwarden Secrets Manager supplies a provider key, 'hermes model'
and the setup wizard show 'credentials ✓' with no hint of where the
key came from — identical to the .env case. Users assume the integration
isn't wired up and re-enter the key (or hit Enter and cancel).
env_loader now tracks which env vars were injected by an external secret
source and exposes get_secret_source() / format_secret_source_suffix() so
the provider flows can render 'Anthropic credentials: sk-ant-... ✓
(from Bitwarden)' instead of an unlabeled checkmark.
Wired into _prompt_api_key (kimi, z.ai, minimax, opencode, ...), the
Anthropic provider flow, the Bedrock flow, and the GitHub Copilot token
display.
Future secret sources (Vault, 1Password, etc.) drop in by setting their
own label in _SECRET_SOURCES; format_secret_source_suffix() has a generic
fallback so no call sites need updating.
