fix(build): add explicit [[bin]] configuration to prevent target inference conflicts

This addresses the Windows build issues reported in #1654:
- Adds explicit [[bin]] configuration for the zeroclaw binary
- Prevents potential silent build failures when src/lib.rs and src/main.rs coexist
- The raw string syntax issues in leak_detector.rs and Deserialize imports
  were already fixed in previous commits

Closes #1654

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

Cargo.toml

@@ -234,6 +234,10 @@ criterion = { version = "0.8", features = ["async_tokio"] }
 wiremock = "0.6"
 scopeguard = "1.2"
 
+[[bin]]
+name = "zeroclaw"
+path = "src/main.rs"
+
 [[bench]]
 name = "agent_benchmarks"
 harness = false