Resolve Client.Python-022..026: TLS-by-default, batch CLI, README

Client.Python-022  README CLI examples for stream-alarms and
                   acknowledge-alarm now use the correct flags;
                   regression test parses every documented line through
                   Click.
Client.Python-023  Re-applied Client.Python-013 — _use_plaintext drops
                   the silent localhost / 127.0.0.1 auto-downgrade
                   branch; --plaintext and --tls are mutually exclusive
                   and TLS is the default.
Client.Python-024  batch dispatch routes through main.main(...,
                   standalone_mode=False) under a redirected stdout
                   instead of click.testing.CliRunner; recursive batch
                   lines are rejected outright.
Client.Python-025  Added behavioural tests for the five bulk SDK methods,
                   stream_alarms, and the new CLI subcommands.
Client.Python-026  _bench_read_bulk hoists 'import time' to module scope
                   and logs cleanup failures instead of swallowing them.

All resolved at 2026-05-24; python -m pytest is 65/65 green.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

clients/python/README.md

@@ -198,8 +198,8 @@ mxgw-py register --session-id <id> --client-name python-client --json
 mxgw-py add-item --session-id <id> --server-handle 1 --item Object.Attribute --json
 mxgw-py advise --session-id <id> --server-handle 1 --item-handle 2 --json
 mxgw-py stream-events --session-id <id> --max-events 1 --json
-mxgw-py stream-alarms --session-id <id> --max-messages 1 --json
-mxgw-py acknowledge-alarm --session-id <id> --alarm-reference "\\Galaxy\Area001.Pump001.PumpFault" --json
+mxgw-py stream-alarms --max-messages 1 --json
+mxgw-py acknowledge-alarm --reference "\\Galaxy\Area001.Pump001.PumpFault" --json
 mxgw-py write --session-id <id> --server-handle 1 --item-handle 2 --type int32 --value 123 --json
 ```