fix(taskbroker): Override Topic and Namespace in Task Sender Locally

[george-sentry]

Before, when calling taskbroker-send-tasks with topic and namespace override, they would be set as global options. This breaks routing for other taskworkers using the same database. So let's override topic and namespace locally instead.

[untitaker]

this can't work -- we need to have route overrides in options for inc response, just not set them globally from this one command.

[cursor]

Cursor Bugbot has reviewed your changes and found 1 potential issue.

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