feat(non-evm): operator binding config, planner hints, and validation

- Add config/non-evm-operator-binding.json (public hints only; no secrets).
- Extend .env.master.example with XRPL/Tron/Solana/TRONGRID overrides.
- Wire solana-gru-bridge-lineup refs; refresh non-evm lane stubs from binding.
- Teach liquidity-gap planner to read binding; validate JSON in validate-config-files.sh.
- Document handoff in CWUSDC_NON_MANUAL_PROVIDER_TASKS; cross-link GRU spec.

Co-authored-by: Cursor <cursoragent@cursor.com>

scripts/validation/validate-config-files.sh

@@ -93,6 +93,24 @@ else
       fi
     fi
   fi
+  if [[ -f "$PROJECT_ROOT/config/non-evm-operator-binding.json" ]]; then
+    log_ok "Found: config/non-evm-operator-binding.json"
+    if command -v jq &>/dev/null; then
+      if jq -e '
+        (.version | type == "string")
+        and (.xrpl | type == "object")
+        and (.tron | type == "object")
+        and (.minimumFundingTargets | type == "object")
+      ' "$PROJECT_ROOT/config/non-evm-operator-binding.json" &>/dev/null; then
+        log_ok "non-evm-operator-binding.json: structure valid"
+      else
+        log_err "non-evm-operator-binding.json: invalid structure"
+        ERRORS=$((ERRORS + 1))
+      fi
+    fi
+  else
+    log_warn "Optional config/non-evm-operator-binding.json missing; skipping"
+  fi
   if [[ -f "$PROJECT_ROOT/config/public-routing-coverage-matrix.json" ]]; then
     log_ok "Found: config/public-routing-coverage-matrix.json"
     if command -v jq &>/dev/null; then