Sources that always work (botvrij, disconnect, oisd, openphish, phishtank, quad9) drop their user-facing enable_* option; the rule's enabled/disabled state is now solely controlled by the SDK rule toggle. Sources that require credentials (criminalip, malwarebazaar, otx, pulsedive, safebrowsing, threatfox, urlhaus, virustotal) instead implement the new SourcePrecheck interface so the host UI can surface "not configured" before attempting a query.
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.
Each source's Query() method previously set r.Listed and r.Severity,
embedding verdict logic inside the prober. Evaluation now lives in a
dedicated Evaluate(SourceResult) (bool, string) method per source,
keeping Query() as pure observation.
A package-level EvaluateResult() helper looks up the source by ID and
delegates to its Evaluate method; rules.go, report.go, types.go, and
provider.go all call this instead of reading pre-set r.Listed/r.Severity
values. An unknownSource sentinel handles results whose source is no
longer registered.
