fix: align production defaults and close review parity gaps

Ship greenfield min_rr=2.0 and conf=0, read-only Structural S/R, indicator
cache invalidation, and UI/gate language that treats GTL as screening not exit.
Align strategy_rank missing-vol fallback live vs backtest, single-source
PRIMARY_TARGET_MIN_RR, expand prod parity tests, and drop dead FE clients.

app/services/outcome_service.py

@@ -1,11 +1,15 @@
 """Trade setup outcome evaluation service.
 
-Closes the feedback loop on R:R scanner setups: walks daily OHLCV bars
-after detection and records whether the stop or the target was hit first.
+Diagnostic barrier resolution for scanner setups: walks daily OHLCV bars
+after detection and records whether the gate target or the stop was hit first.
+
+This is **not** the production exit model. Live paper trades and the portfolio
+monitor use ATR trail / max hold and never exit at the gate target. Track-record
+stats from this path measure gate-level plumbing, not ATR-trail book expectancy.
 
 Outcome semantics (entry is the close at detection time, i.e. market entry):
-  - target_hit: target reached before the stop
-  - stop_hit:   stop reached before the target
+  - target_hit: gate target reached before the stop
+  - stop_hit:   stop reached before the gate target
   - ambiguous:  stop AND target both within the same daily bar — with daily
                 granularity the order is unknowable, counted as a loss in stats
   - expired:    neither level hit within ``max_bars`` trading days