Make port configurable (default 5100)

- Port now set via config.json "port" field
- Aggregator reads PORT from environment variable
- Updated all docs and scripts to use port 5100

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

kao.py

@@ -89,11 +89,17 @@ class KaoManager:
                     break
                 print(f"[{name}] {line.rstrip()}")
 
+    def get_aggregator_url(self):
+        """Get aggregator URL from config port."""
+        port = self.config.get("port", 5100)
+        return f"http://localhost:{port}"
+
     def start_aggregator(self):
         """Start the aggregator service."""
         agg_config = self.config.get("aggregator", {})
         script = agg_config.get("script", "aggregator.py")
         env = agg_config.get("env", {})
+        env["PORT"] = str(self.config.get("port", 5100))
 
         process = self.start_process("aggregator", script, env)
         if process:
@@ -102,13 +108,12 @@ class KaoManager:
                 "config": {"name": "aggregator", "script": script, "env": env},
             }
             # Wait for aggregator to be ready
-            url = self.config.get("aggregator_url", "http://localhost:5000")
-            return self.wait_for_aggregator(url)
+            return self.wait_for_aggregator(self.get_aggregator_url())
         return False
 
     def start_detectors(self):
         """Start all enabled detectors."""
-        url = self.config.get("aggregator_url", "http://localhost:5000")
+        url = self.get_aggregator_url()
 
         for detector in self.config.get("detectors", []):
             if not detector.get("enabled", True):
@@ -140,7 +145,7 @@ class KaoManager:
 
                 if self.running:
                     config = info["config"]
-                    env = {"AGGREGATOR_URL": self.config.get("aggregator_url", "http://localhost:5000")}
+                    env = {"AGGREGATOR_URL": self.get_aggregator_url()}
                     env.update(config.get("env", {}))
 
                     new_process = self.start_process(name, config["script"], env)
@@ -186,7 +191,7 @@ class KaoManager:
         print("  Kao")
         print("=" * 50)
         print(f"Config: {self.config_path}")
-        print(f"Aggregator URL: {self.config.get('aggregator_url')}")
+        print(f"Port: {self.config.get('port', 5100)}")
         print()
 
         enabled = [d["name"] for d in self.config.get("detectors", []) if d.get("enabled", True)]
@@ -211,7 +216,7 @@ class KaoManager:
 
         print()
         print("=" * 50)
-        print(f"  UI available at: {self.config.get('aggregator_url')}")
+        print(f"  UI available at: {self.get_aggregator_url()}")
         print("=" * 50)
         print()