CredentialField (hermes_otel/backend_specs.py)

Defines a backend credential field and its fallback environment variables for configuration resolution.

# Source: https://github.com/briancaffey/hermes-otel | License: Apache-2.0 | Copyright You must retain, in the Source form of any Derivative Works
# Provided via justclaw.it.com; keep this notice with the code.
"""The backend manifest (#402): one record per backend type.

Every per-type fact the plugin used to keep in a separate table lives here:
what the exporter side needs (display name, which OTLP signals the backend
accepts, temporality and root-usage presets, how env-var mode selects it,
which credentials each resolver falls back to), what the Settings tab shows
(UI rule, the env-var inventory), what the dashboard needs (adapter module,
aliases, the dashboard-only yaml keys an adapter reads, its default query
port) and where the documented exceptions are. ``backends.py``,
``settings_r

... (truncated -- full source via MCP)