Rename BLE device "Claude Controller" → "Clawdmeter"

Brand consistency: the device now advertises as "Clawdmeter". Updated the
three functional spots that must agree for discovery-by-name to work —
ble.cpp DEVICE_NAME (advertised) and both daemons' DEVICE_NAME (scan match) —
plus the README/CLAUDE.md/install-script references (and fixed the stray
"Claudemeter" typo in the README).

Note: hosts cache the GATT name, so an already-paired device keeps showing the
old name until removed/re-paired (bluetoothctl remove <mac>).

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

daemon/claude-usage-daemon.sh

@@ -1,10 +1,10 @@
 #!/bin/bash
 # Claude Usage Tracker Daemon (BLE)
 # Reads Claude Code OAuth token, polls usage via API, sends to ESP32 over BLE GATT.
-# Auto-connects and reconnects to the Claude Controller BLE device.
+# Auto-connects and reconnects to the Clawdmeter BLE device.
 # Dependencies: curl, awk, bluetoothctl
 
-DEVICE_NAME="Claude Controller"
+DEVICE_NAME="Clawdmeter"
 DEVICE_MAC="${DEVICE_MAC:-}"  # auto-discovered if empty
 SERVICE_UUID="4c41555a-4465-7669-6365-000000000001"
 RX_CHAR_UUID="4c41555a-4465-7669-6365-000000000002"
@@ -60,7 +60,7 @@ save_mac() {
     echo "$DEVICE_MAC" > "$SAVED_MAC_FILE"
 }
 
-# Scan for Claude Controller
+# Scan for Clawdmeter
 scan_for_device() {
     log "Scanning for '$DEVICE_NAME'..."
     # Start LE scan