chore: Enable aggressive binary size optimization

Cargo.toml

@@ -1,3 +1,11 @@
 [workspace]
 members = ["backend", "frontend"]
 resolver = "2"
+
+# Optimize for size (aggressive)
+[profile.release]
+opt-level = "z"
+lto = true
+codegen-units = 1
+panic = "abort"
+strip = true