Rules can be limited to schedule blocks

Each rule has the blocks it acts in (none: always; without a running
schedule always). Stored as a block mask (schedule format 2, version 1
records are converted), in JSON as the blocks' start times. Version 2.7.1.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

src/esp32/config.h

@@ -105,7 +105,7 @@ const uint32_t SETUP_AP_DELAY = 20000;        // open the AP when WiFi fails thi
 const uint32_t WIFI_CONNECT_TIMEOUT = 30000;
 const uint32_t WIFI_RESTART_TIME = 10UL * 60 * 1000;
 
-#define FIRMWARE_VERSION "2.7.0"
+#define FIRMWARE_VERSION "2.7.1"
 
 // Home Assistant device id (do not change: Home Assistant's entities are linked to it)
 const uint8_t HA_DEVICE_ID[] = {0x34, 0x86, 0x5d, 0x3a, 0x08, 0x28};