feat: complete vendor repos, add edge intelligence and WASM modules

- Add 154 missing vendor files (gitignore was filtering them)
  - vendor/midstream: 564 files (was 561)
  - vendor/sublinear-time-solver: 1190 files (was 1039)
- Add ESP32 edge processing (ADR-039): presence, vitals, fall detection
- Add WASM programmable sensing (ADR-040/041) with wasm3 runtime
- Add firmware CI workflow (.github/workflows/firmware-ci.yml)
- Add wifi-densepose-wasm-edge crate for edge WASM modules
- Update sensing server, provision.py, UI components

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

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

@@ -0,0 +1,33 @@
+/**
+ * @file ota_update.h
+ * @brief HTTP OTA firmware update endpoint for ESP32-S3 CSI Node.
+ *
+ * Provides an HTTP server endpoint that accepts firmware binaries
+ * for over-the-air updates without physical access to the device.
+ */
+
+#ifndef OTA_UPDATE_H
+#define OTA_UPDATE_H
+
+#include "esp_err.h"
+
+/**
+ * Initialize the OTA update HTTP server.
+ * Starts a lightweight HTTP server on port 8032 that accepts
+ * POST /ota with a firmware binary payload.
+ *
+ * @return ESP_OK on success.
+ */
+esp_err_t ota_update_init(void);
+
+/**
+ * Initialize the OTA update HTTP server and return the handle.
+ * Same as ota_update_init() but exposes the httpd_handle_t so
+ * other modules (e.g. WASM upload) can register additional endpoints.
+ *
+ * @param out_server  Output: HTTP server handle (may be NULL on failure).
+ * @return ESP_OK on success.
+ */
+esp_err_t ota_update_init_ex(void **out_server);
+
+#endif /* OTA_UPDATE_H */