fix: graceful degradation on user mismatch

Instead of crashing (which copilot shows as 'Connection closed'),
the proxy now catches startup errors, completes the MCP handshake,
and returns the error message when tools are called. This way the
AI sees the misconfiguration and can explain it to the user.

Also uses PKG.version for MCP server version instead of hardcoded.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Author: BrainSlugs83

index.js

@@ -42,10 +42,10 @@ function validateServer(pingResult) {
   if (!pingResult || !pingResult.ok) return null;
 
   if (pingResult.user && pingResult.user !== EXPECTED_USER) {
-    const msg = `[vector-memory] FATAL: Port ${PORT} is owned by user "${pingResult.user}" (expected "${EXPECTED_USER}"). ` +
-      `Set VECTOR_MEMORY_PORT to a different port in your mcp-config.json.\n`;
-    process.stderr.write(msg);
-    process.exit(1);
+    throw new Error(
+      `Port ${PORT} is owned by user "${pingResult.user}" (expected "${EXPECTED_USER}"). ` +
+      `Set VECTOR_MEMORY_PORT to a different port in your mcp-config.json.`
+    );
   }
 
   if (pingResult.version && pingResult.version !== PKG.version) {
@@ -142,11 +142,16 @@ function callServer(path, body) {
 
 // --- Start: ensure server, then expose MCP tools ---
 
-await ensureServer();
+let startupError = null;
+try {
+  await ensureServer();
+} catch (err) {
+  startupError = err.message;
+}
 
 const server = new McpServer({
   name: "vector-memory",
-  version: "1.0.0",
+  version: PKG.version,
 });
 
 server.tool(
@@ -164,6 +169,9 @@ server.tool(
       .describe("Max results to return (default 10)"),
   },
   async ({ query, limit }) => {
+    if (startupError) {
+      return { content: [{ type: "text", text: `⚠ vector-memory misconfigured: ${startupError}` }] };
+    }
     try {
       const results = await callServer("/search", { query, limit });
 
@@ -194,6 +202,9 @@ server.tool(
     "vector_search auto-indexes new content. Use this if the index seems stale or corrupted.",
   {},
   async () => {
+    if (startupError) {
+      return { content: [{ type: "text", text: `⚠ vector-memory misconfigured: ${startupError}` }] };
+    }
     try {
       const result = await callServer("/reindex", {});
       if (result.error) {