fix(docker): Update Dockerfile paths from src/ to v1/src/

The source code was moved to v1/src/ but the Dockerfile still
referenced src/ directly, causing build failures. Updated all
COPY paths, uvicorn module paths, test paths, and bandit scan
paths. Also added missing v1/__init__.py for Python module
resolution.

Fixes #33

Co-Authored-By: claude-flow <ruv@ruv.net>

firmware/esp32-csi-node/main/stream_sender.h

@@ -17,6 +17,16 @@
  */
 int stream_sender_init(void);
 
+/**
+ * Initialize the UDP sender with explicit IP and port.
+ * Used when configuration is loaded from NVS at runtime.
+ *
+ * @param ip   Aggregator IP address string (e.g. "192.168.1.20").
+ * @param port Aggregator UDP port.
+ * @return 0 on success, -1 on error.
+ */
+int stream_sender_init_with(const char *ip, uint16_t port);
+
 /**
  * Send a serialized CSI frame over UDP.
  *