archive el_runtime.c — native El runtime complete, seed is self-contained

el_seed.c now defines el_request_start/el_request_end directly (delegating
to its own seed arena) rather than declaring them as externs from el_runtime.c.
Header comment updated to reflect self-contained build.

tools/lsp/vscode-extension/extension.js

@@ -45,10 +45,17 @@ function activate(context) {
     // ── Resolve el-lsp binary ────────────────────────────────────────────
     const config = workspace.getConfiguration('el');
 
-    // Default path: ../dist/el-lsp relative to the extension root.
-    // Override with the "el.lspPath" workspace/user setting.
-    const defaultLspPath = path.join(context.extensionPath, '..', 'dist', 'el-lsp');
-    const serverPath     = config.get('lspPath', defaultLspPath);
+    // Default path resolution (tries in order):
+    //   1. el.lspPath setting (user override)
+    //   2. dist/el-lsp alongside the extension dir (packaged install)
+    //   3. The canonical source-tree location
+    const CANONICAL_LSP = '/Users/will/Development/neuron-technologies/foundation/el/tools/lsp/dist/el-lsp';
+    const defaultLspPath = (() => {
+        const sibling = path.join(context.extensionPath, 'dist', 'el-lsp');
+        if (fs.existsSync(sibling)) return sibling;
+        return CANONICAL_LSP;
+    })();
+    const serverPath = config.get('lspPath') || defaultLspPath;
 
     if (!fs.existsSync(serverPath)) {
         window.showErrorMessage(