feat: v0.1.3 — fleet management endpoints

- GET /sensors/<hostname>/config: query sensor STATUS, parse response
- PUT /sensors/<hostname>/config: update rate, power, adaptive, etc.
- POST /sensors/<hostname>/ota: trigger OTA update with URL
- POST /sensors/<hostname>/calibrate: trigger baseline calibration

Added 14 new tests for fleet management endpoints.

pyproject.toml

@@ -1,6 +1,6 @@
 [project]
 name = "esp32-web"
-version = "0.1.2"
+version = "0.1.3"
 description = "REST API backend for ESP32 sensor fleet"
 requires-python = ">=3.11"
 dependencies = [