feat(advanced-retrigger-jobs): Convert bash to Python with typer

[okurz]

Motivation:
The bash script built SQL and ssh command lines by string
interpolation, which is hard to test and easy to break.

Design Choices:
Options keep the old environment variable names via typer envvar
so existing cron invocations keep working. Job IDs are sent with
openqa_client instead of shelling out to openqa-cli, reusing the
shared client config and retries.

Benefits:
Importable module with 100% statement and branch coverage, ruff
and ty clean without broad file level exclusions, and faster
startup than the previous shell implementation.

[plusky]

dry_run=1 used to echo the command, but the note is now log.info, invisible at default WARNING: without -v nothing prints, contradicting "Only print what would be done". Log at warning level or document -v.

Also, ssh/psql stderr is now swallowed: capture_output=True keeps it in err.stderr, but the handler only logs the exception, so auth/SQL errors vanish where bash printed them. Log err.stderr before exiting.

Parity otherwise verified: identical SQL, batching, JOB_IDS parsing, scheme default, 24 tests pass, ruff clean.