Add production rollout tooling and semantic index ops docs

Capture the production plugin rollout workflow and Qdrant validation steps so operations stay repeatable. Also harden redMCP stdio/schema compatibility to keep diverse MCP clients and validators working.

redMCP/app/McpStdioServer.php

@@ -7,6 +7,7 @@ namespace RedMCP;
 final class McpStdioServer
 {
     private McpDispatcher $dispatcher;
+    private string $wireMode = 'content-length';
 
     public function __construct(McpDispatcher $dispatcher)
     {
@@ -36,7 +37,8 @@ final class McpStdioServer
             if ($line === '') {
                 break;
             }
-            if (!str_contains($line, ':')) {
+            if (!preg_match('/^[A-Za-z0-9-]+\s*:/', $line)) {
+                $this->wireMode = 'line';
                 $decoded = json_decode($line, true);
                 return is_array($decoded) ? $decoded : null;
             }
@@ -76,6 +78,12 @@ final class McpStdioServer
             return;
         }
 
+        if ($this->wireMode === 'line') {
+            fwrite(STDOUT, $body . "\n");
+            fflush(STDOUT);
+            return;
+        }
+
         fwrite(STDOUT, 'Content-Length: ' . strlen($body) . "\r\n\r\n" . $body);
         fflush(STDOUT);
     }