Fix dashboard wasm build and feature-gate mongodb for wasm compatibility

- Feature-gate mongodb in compliance-core (optional, default on) so wasm
  builds don't pull in tokio/mio via mongodb
- Use bson v2 directly for ObjectId types (wasm-compatible)
- Restructure dashboard infrastructure/mod.rs: server function modules
  always compiled (for RPC stubs), server-only modules cfg-gated
- Remove reqwest from dashboard web feature (not needed, data flows
  through server functions)
- Add .gitignore

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

compliance-dashboard/Cargo.toml

@@ -12,11 +12,12 @@ path = "../bin/main.rs"
 workspace = true
 
 [features]
-web = ["dioxus/web", "dioxus/router", "dioxus/fullstack", "dep:reqwest", "dep:web-sys"]
+web = ["dioxus/web", "dioxus/router", "dioxus/fullstack", "dep:web-sys"]
 server = [
     "dioxus/server",
     "dioxus/router",
     "dioxus/fullstack",
+    "compliance-core/mongodb",
     "dep:axum",
     "dep:mongodb",
     "dep:reqwest",
@@ -29,7 +30,7 @@ server = [
 ]
 
 [dependencies]
-compliance-core = { workspace = true }
+compliance-core = { workspace = true, default-features = false }
 dioxus = "=0.7.3"
 dioxus-free-icons = { version = "0.10", features = ["bootstrap"] }
 serde = { workspace = true }