health: document sol call health pipeline + reframe description
apps/health/call.py exposes `sol call health pipeline` (the only
command actually defined by the health app itself) but the skill
never documented it. Add a pipeline-summary section with --day /
--yesterday flags and examples.
Reframe description from "diagnose" infrastructure framing to task
framing ("monitor service uptime, troubleshoot capture gaps"). Make
the tri-scope surface explicit (sol health*, sol talent*,
sol call health*) since health diagnostics cross levels. Add a
Gotchas block (callosum 10s timeout, ms-precision talent log IDs,
today-vs-yesterday pipeline window). Expand TRIGGER.
Part of skills audit req_loq3e2lk pass 1+2.