Each registered Source now becomes its own CheckRule (name = source ID)
implementing CheckRuleWithOptions, so the host can toggle blacklists
individually and the per-source option fields show up under the rule
that owns them instead of one flat global option list.
Collect honours the host's per-rule enable map (via the SDK's
RuleEnabled context helper) and skips the network call for disabled
sources entirely, not just their evaluation.
