feat: Add server management and database migrations

- Add start/stop/restart/status commands to Makefile
- Add health endpoint with uptime tracking
- Add CLI module (esp32-web command)
- Add initial database migration
- Listen on all interfaces (0.0.0.0:5500)

Bump version to 0.1.1

pyproject.toml

@@ -1,6 +1,6 @@
 [project]
 name = "esp32-web"
-version = "0.1.0"
+version = "0.1.1"
 description = "REST API backend for ESP32 sensor fleet"
 requires-python = ">=3.11"
 dependencies = [
@@ -23,6 +23,9 @@ dev = [
 requires = ["setuptools>=68"]
 build-backend = "setuptools.build_meta"
 
+[project.scripts]
+esp32-web = "esp32_web.cli:cli"
+
 [tool.setuptools.packages.find]
 where = ["src"]