AACS pipeline reshape + TrueHD metadata + central consts + clippy/fmt clean

- AACS: delete in-lib keydb parser (Step 3); boil-down primitives
  (mk_from_dk/vuk_from_mk/uk_from_vuk) + newtypes; KeySource->get_uk(ctx)+
  ResolveCtx; Unlocker->unlock()->Result<Vid,UnlockError> + AacsCertUnlocker;
  OEM bus-key gate (AacsBusKeyUnavailable); structured ResolutionTrace (Step 4).
- TrueHD: sample-rate from major-sync, Atmos label, 44.1k AU duration.
- consts: central media/format constants module; 17 duplicate const-defs
  centralized (sector/TS-packet/source-packet); mpls stream-entry + category
  codes named.
- clippy --all-targets -D warnings clean (1.86); fmt clean; 2199 lib tests.

src/disc/patch.rs

@@ -2588,7 +2588,7 @@ mod tests {
             range_sectors: 1,
         };
 
-        let timed_out = check_range_watchdog(&mut state, &frame, &*shared);
+        let timed_out = check_range_watchdog(&mut state, &frame, &shared);
         assert!(!timed_out, "range must not time out immediately");
         // With correct initialization bytes_good_now == range_bytes_good,
         // so the `bytes_good_now > range_bytes_good` branch does NOT fire