feat: make ares self-contained workspace with bundled domain/mt5-client crates

Vendor domain and mt5-client from hermes into crates/ so the repo can
be pushed to GitHub without external path dependencies.

Also includes all bug fixes from autonomous session:
- impulse SL fix (SL at impulse candle low/high, not zone edge)
- pip_size fix for 5-decimal pairs
- fill_ok premature cancellation fix
- TIMEOUT_CANDLES, MIN_FVG_PIPS, MIN_SL_PIPS env vars

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Cargo.toml

@@ -1,3 +1,7 @@
+[workspace]
+members  = [".", "crates/domain", "crates/mt5-client"]
+resolver = "2"
+
 [package]
 name    = "ares"
 version = "0.1.0"
@@ -17,5 +21,5 @@ tokio              = { version = "1", features = ["full"] }
 tracing            = "0.1"
 tracing-subscriber = { version = "0.3", features = ["env-filter"] }
 
-domain     = { path = "../hermes/crates/domain" }
-mt5-client = { path = "../hermes/crates/mt5-client" }
+domain     = { path = "crates/domain" }
+mt5-client = { path = "crates/mt5-client" }