unlock: add Unlocker::name() + report-only applies_to() for the matrix

Each unlocker now carries its own stable name() (the single source; apps
never hardcode it) and a report-only applies_to() — phase-independent
'would this apply to this drive+disc', distinct from the dispatch-gated
matches(). LibreDrive overrides applies_to to report on drive identity
regardless of disc kind (its matches() is gated to the Unknown-kind init
phase). Enables a registry-driven unlocker matrix.

src/ld/mod.rs

@@ -121,10 +121,22 @@ impl Unlocker for LibreDrive {
     /// probed (`kind == Unknown`) and keys off the drive identity. It must NOT
     /// fire during the later content-keyed dispatch (Aacs/Css), or a DVD/Blu-ray
     /// in a profiled drive would be re-firmware-unlocked.
+    fn name(&self) -> &'static str {
+        "LibreDrive"
+    }
+
     fn matches(&self, ctx: &UnlockCtx) -> bool {
         ctx.kind == crate::DiscKind::Unknown && profile::find_bundled(ctx.drive_id).is_some()
     }
 
+    /// For the report, the drive unlocker applies whenever it recognises the
+    /// DRIVE — independent of disc kind (its live `matches` is gated to the
+    /// Unknown-kind init phase, which would falsely read "no" once the disc kind
+    /// is known).
+    fn applies_to(&self, ctx: &UnlockCtx) -> bool {
+        profile::find_bundled(ctx.drive_id).is_some()
+    }
+
     /// Firmware-unlock the drive and report its OEM Volume ID. The unlocked drive
     /// serves CLEAR content, so `drive_unlocked: true` and there is no bus key.
     ///

src/ld/profile.rs

@@ -290,10 +290,7 @@ fn load_from_str(data: &str) -> Result<Profiles> {
 /// profile; the looser pass lets a drive whose firmware date we don't have
 /// on file still match a same-model profile. All comparisons are
 /// whitespace-trimmed. Returns the first section that yields a match.
-pub fn find_by_drive_id(
-    profiles: &Profiles,
-    drive_id: &crate::DriveId,
-) -> Option<ProfileMatch> {
+pub fn find_by_drive_id(profiles: &Profiles, drive_id: &crate::DriveId) -> Option<ProfileMatch> {
     let v = drive_id.vendor_id.trim();
     let r = drive_id.product_revision.trim();
     let vs = drive_id.vendor_specific.trim();