chore: update all packages to latest versions

- aionui 2.1.4 -> 2.1.50
- desloppify 0.9.15 -> 1.0
- ds4 -> 2026-08-05 (b030961)
- freebuff 0.0.85 -> 0.0.142 (binary moved to GitHub releases)
- graphify 0.7.10 -> 0.9.35 (license Apache-2.0, fix sed patterns for versioned deps)
- hipengine 0.2.2 -> 0.3.0 (console script renamed to hipengine)
- kubernetes-mcp-server 0.0.62 -> 0.0.66 (requires go >= 1.26.3)
- mcp-gateway 2.11.0 -> 3.4.0 (requires rustc >= 1.95)
- omniroute 3.8.28 -> 3.8.49
- radar 1.6.1 -> 1.9.1 (drop obsolete lockfile sed patch)
- relay-free-llm -> 96e6c48, cerebras-cloud-sdk 1.67.0 -> 1.91.0
- stakpak 0.3.86 -> 0.3.88

Add nixpkgs-latest input for toolchains newer than the pinned nixpkgs.

packages/hipengine/package.nix

@@ -6,14 +6,14 @@
 
 python3Packages.buildPythonApplication rec {
   pname = "hipengine";
-  version = "0.2.2";
+  version = "0.3.0";
   pyproject = true;
 
   src = fetchFromGitHub {
     owner = "shisa-ai";
     repo = "hipEngine";
     rev = "v${version}";
-    hash = "sha256-ljgXDQfUTx64i1+yAKFE13GkcE9AE+1YICfSScQ9nuA=";
+    hash = "sha256-lnYsXTxke5LLMbHOt6i2FM8IrnHCimC/va1fJL5G4PQ=";
   };
 
   build-system = with python3Packages; [
@@ -47,6 +47,8 @@ python3Packages.buildPythonApplication rec {
     changelog = "https://github.com/shisa-ai/hipEngine/releases/tag/v${version}";
     license = lib.licenses.agpl3Plus;
     platforms = lib.platforms.linux;
-    mainProgram = "hipengine-server";
+    # Upstream replaced the hipengine-server console script with
+    # a top-level `hipengine` command (e.g. `hipengine serve`).
+    mainProgram = "hipengine";
   };
 }