* Rename AnalysisInfo field to SecretParts on detectors.Result
Mechanical rename of the detectors.Result.AnalysisInfo field to
SecretParts to prepare for its replacement for Raw.
* Document SecretParts contract in detector-authoring docs
Adds a "Populating SecretParts" section to both the external and internal
detector-authoring guides. Covers what SecretParts is, the rule that every
Result must populate it, and the shape for single-part vs multi-part
credentials with code examples. Establishes "key" as the convention for
single-part detectors (matches ~48 existing detectors vs ~13 using "token").
Miccah
685270b0ad