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/scsi/mod.rs

@@ -992,7 +992,8 @@ mod scsi_sense_predicate_tests {
         // Each is_* predicate matches exactly its one key and no other.
         // Catches a copy-paste bug where e.g. is_not_ready compared the
         // wrong constant.
-        let cases: &[(u8, fn(&ScsiSense) -> bool)] = &[
+        type SenseCase = (u8, fn(&ScsiSense) -> bool);
+        let cases: &[SenseCase] = &[
             (SENSE_KEY_MEDIUM_ERROR, ScsiSense::is_medium_error),
             (SENSE_KEY_HARDWARE_ERROR, ScsiSense::is_hardware_error),
             (SENSE_KEY_NOT_READY, ScsiSense::is_not_ready),
@@ -1126,6 +1127,7 @@ mod inquiry_tests {
     //!   - vendor identification: bytes 8..16 (8 ASCII chars)
     //!   - product identification: bytes 16..32 (16 ASCII chars)
     //!   - product revision level: bytes 32..36 (4 ASCII chars)
+    //!
     //! Fields are space-padded ASCII; the parser trims surrounding
     //! whitespace.
     use super::*;