Adds a 'triage_aux_unavailable' diagnostic for tasks stuck in triage when
neither the active aux helper slot nor the main-model auto fallback is usable.
Auto-decompose aware:
- kanban.auto_decompose=True (default): primary is auxiliary.kanban_decomposer,
triage_specifier is the fanout=false fallback.
- kanban.auto_decompose=False: primary is auxiliary.triage_specifier (manual
'hermes kanban specify' path).
Default aux slots use 'provider: auto' which falls back to the main model, so
this rule only fires when both the explicit slot config AND the main-model
auto fallback are absent. Quiet by default; informative when there is a real
config gap.
Also adds kd.config_from_runtime_config() that carries kanban + auxiliary +
model keys through to diagnostics, and updates CLI/dashboard call sites to
use it. config_from_kanban_config() is preserved for back-compat.
Reworks the original PR #25640 idea (@qWaitCrypto) to align with the new
auto-decompose dispatcher path landed in #27572. The original PR pointed only
at auxiliary.triage_specifier, which is now the fallback rather than the
primary helper.
Co-authored-by: qWaitCrypto <axmaiqiu@gmail.com>
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