Deploy metals sizing: XAUUSD 1.00->0.75, XAGUSD 1.00->0.35

Per user decision 2026-07-22/23, applying the endorsed sizing from the
metals sizing review (skipping the 'temporary ceiling' variant). Caps
per-position risk at ~$1,125 gold / ~$1,750 silver (vs $1,500/$5,000
at 1.00 lot); tail case (4 stops both sides, both symbols) now ~$5,750
(~5.1% of $111k equity) vs the prior ~$26k. Cross-EA combined-risk cap
(the doc's other ask) remains a separate future v5.7 task -- not yet
built, so the account-level dollar cap is not enforced, only the
per-symbol lot reduction.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

bo-xagusd.set

@@ -9,7 +9,7 @@ InpManualHigh=0
 InpManualLow=0
 Entry=60
 TP=3000
-Lots=1.00
+Lots=0.35
 MaxLevels=2
 
 ; === Range Filters ===

bo-xauusd.set

@@ -9,7 +9,7 @@ InpManualHigh=0
 InpManualLow=0
 Entry=100
 TP=5000
-Lots=1.00
+Lots=0.75
 MaxLevels=2
 
 ; === Range Filters ===