Send service output to the journal at once

Set PYTHONUNBUFFERED=1 in the three service files. Python buffers its output if it does not write to a terminal, so log lines reached the journal late.

bmspy-influxdb.service

@@ -5,6 +5,8 @@ Requires=bmspy-server.service
 [Service]
 Type=exec
 WorkingDirectory=/usr/local/bmspy
+# Send each log line to the journal at once.
+Environment=PYTHONUNBUFFERED=1
 ExecStart=uv run --no-sync bmspy-influxdb --url http://localhost/ --org 0987654321 --bucket bms --token XXXX
 RestartSec=5
 Restart=on-failure

bmspy-server.service

@@ -5,6 +5,8 @@ Description=Make BMS data available for consumers
 Type=exec
 # The full path of the git repo on your system
 WorkingDirectory=/usr/local/bmspy
+# Send each log line to the journal at once.
+Environment=PYTHONUNBUFFERED=1
 ExecStartPre=/usr/bin/install -d -onobody -gdialout -m770 /run/bmspy
 ExecStart=uv run --no-sync bmspy-server
 RestartSec=5

bmspy-ups.service

@@ -5,6 +5,8 @@ Requires=bmspy-server.service
 [Service]
 Type=exec
 WorkingDirectory=/usr/local/bmspy
+# Send each log line to the journal at once.
+Environment=PYTHONUNBUFFERED=1
 # Add --device NAME if bmspy-server reads more than one device.
 ExecStart=uv run --no-sync bmspy-ups
 RestartSec=5