Jev classifier in tandem with the LLM Sentry

- Jev (TypeSafe, direct) triages mode and task type with confidence
- Its call stands at >= 70% on both and no split; otherwise the LLM
  Sentry decides (unsure, split needs subtasks, or Jev down)
- Jev flights obey the same budget, flock cap, timeout and log
- Tests for every path; flight log is nil-safe
- start.command reads TYPESAFE_API_KEY and threshold from .env

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01UQnSw4RRWp8uqpj3nsnnXF

start.command

@@ -7,6 +7,8 @@
 #   ANTHROPIC_API_KEY=...       Claude direct from Anthropic (default: claude-sonnet-5-5)
 #   CROWS_PROVIDER=openrouter   optional: pick one when both keys are present
 #   CROWS_MODEL=...             optional: a specific model
+#   TYPESAFE_API_KEY=...        Jev classifier for the Sentry's triage (LLM is the fallback)
+#   CROWS_JEV_THRESHOLD=0.7     optional: below this confidence, triage escalates to the LLM
 # `./start.command --mock` forces offline mock crows.
 #
 # Listens on this Mac only (127.0.0.1:8080). State lives in .crows/ (delete it to start fresh).
@@ -17,9 +19,10 @@ chmod +x ./crows
 
 # Read only these lines from .env; the file is never executed.
 envval() { sed -n "s/^$1=//p" .env 2>/dev/null | head -n 1 | tr -d '[:space:]"'; }
-unset ANTHROPIC_API_KEY OPENROUTER_API_KEY CROWS_PROVIDER CROWS_MODEL
+VARS="ANTHROPIC_API_KEY OPENROUTER_API_KEY CROWS_PROVIDER CROWS_MODEL TYPESAFE_API_KEY CROWS_JEV_MODEL CROWS_JEV_THRESHOLD"
+unset $VARS
 if [ "$1" != "--mock" ]; then
-  for v in ANTHROPIC_API_KEY OPENROUTER_API_KEY CROWS_PROVIDER CROWS_MODEL; do
+  for v in $VARS; do
     val="$(envval "$v")"
     [ -n "$val" ] && export "$v=$val"
   done