Refine usage message and changelog

CHANGELOG.md

@@ -12,7 +12,8 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
   When specified as `matching`, a copy of each encountered blob that has matches will be saved to the datastore's `blobs` directory.
   When specified as `all`, a copy of _each_ encountered blob will be saved.
   The default value is `none`.
-  Saved copies of blobs are used for no additional purpose at present within Nosey Parker.
+  This mechanism exists to aid in ad-hoc downstream investigation.
+  Copied blobs are not used elsewhere in Nosey Parker at this point.
 
 - A new advanced global command-line parameter has been exposed:
 

crates/noseyparker-cli/src/args.rs

@@ -448,6 +448,9 @@ pub struct ScanArgs {
     /// If this option is enabled, corresponding blobs will be written to the `blobs` directory within the datastore.
     /// The format of that directory is similar to Git's "loose" object format:
     /// the first 2 characters of the hex-encoded blob ID name a subdirectory, and the remaining characters are used as the filename.
+    ///
+    /// This mechanism exists to aid in ad-hoc downstream investigation.
+    /// Copied blobs are not used elsewhere in Nosey Parker at this point.
     #[arg(
         long,
         default_value_t=CopyBlobsMode::None,
@@ -517,13 +520,13 @@ pub enum BlobMetadataMode {
 #[derive(Copy, Clone, Debug, Display, PartialEq, Eq, PartialOrd, Ord, ValueEnum)]
 #[strum(serialize_all="kebab-case")]
 pub enum CopyBlobsMode {
-    /// Save all encountered blobs
+    /// Copy all encountered blobs
     All,
 
-    /// Save only blobs with matches
+    /// Copy only blobs with matches
     Matching,
 
-    /// Save no blobs
+    /// Copy no blobs
     None,
 }
 

crates/noseyparker-cli/tests/help/snapshots/test_noseyparker__help__help_scan-2.snap

@@ -177,12 +177,15 @@ Data Collection Options:
           format: the first 2 characters of the hex-encoded blob ID name a subdirectory, and the
           remaining characters are used as the filename.
 
+          This mechanism exists to aid in ad-hoc downstream investigation. Copied blobs are not used
+          elsewhere in Nosey Parker at this point.
+
           [default: none]
 
           Possible values:
-          - all:      Save all encountered blobs
-          - matching: Save only blobs with matches
-          - none:     Save no blobs
+          - all:      Copy all encountered blobs
+          - matching: Copy only blobs with matches
+          - none:     Copy no blobs
 
 Global Options:
   -v, --verbose...