v0.0.11

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• §4.3.4.5 CELT TF-resolution adjustment lookup (round 25)

Added

• Clean-room round 25 (2026-05-30): §4.3.4.5 CELT TF-resolution
  adjustment lookup — a new celt_tf_adjust module owning RFC 6716
  Tables 60–63 (the four (frame_size, choice) -> i8 adjustment
  tables keyed by (transient, tf_select)). Exposes
  celt_tf_adjustment(frame_size, transient, tf_select, tf_change) -> i8 (the routed lookup, return value ∈ [-3, 3]),
  celt_tf_select_can_affect(frame_size, transient, &[bool]) -> bool
  (the §4.3.1 "tf_select is only decoded if it can have an impact on
  the result knowing the value of all per-band tf_change flags"
  redundancy gate that the §4.3.4.5 band loop calls AFTER decoding
  every per-band tf_change[b]), TfDirection::{Unchanged, IncreaseTime(N), IncreaseFrequency(N)} carrying the §4.3.4.5
  Hadamard-transform branch and level count, TfAdjustment (= i8)
  storage type, and named constants TF_ADJUSTMENT_MAX = 3,
  TF_ADJUSTMENT_ABS_MAX = 3, plus the four tables themselves
  (TF_ADJ_NONTRANSIENT_SELECT0, TF_ADJ_NONTRANSIENT_SELECT1,
  TF_ADJ_TRANSIENT_SELECT0, TF_ADJ_TRANSIENT_SELECT1) for direct
  inspection.

  This is the lookup the §4.3.4.5 band loop downstream consumes once
  it's wired up (gated on §4.3.2.1 coarse energy and §4.3.3 bit
  allocation, both still deferred); it sits between Table 55's
  per-band MDCT-bin count and the §4.3.4.2 PVQ shape decoder.

  Twenty-seven new module tests (428 lib tests total, up from 401 at
  round-24 close; 20 integration tests unchanged, grand total 448).
  Coverage: every table's 4 × 2 shape; every cell ∈ [-3, 3]; all
  32 cells across Tables 60 / 61 / 62 / 63 hand-pinned to RFC 6716
  §4.3.4.5; the "non-transient choice = 0 is always 0" invariant;
  the "non-transient choice = 1 is always ≤ 0" invariant; the
  "positive adjustments only on transient frames" §4.3.4.5
  asymmetry pinned at both the table and TfDirection layer; the
  Table 62 choice = 0 monotone 0, 1, 2, 3 scale across frame
  sizes; the universal 2.5 ms [0, -1] row across all four tables;
  TF_ADJUSTMENT_MAX and TF_ADJUSTMENT_ABS_MAX matching the
  observed max over every cell; celt_tf_adjustment entry-point
  routing each (transient, tf_select) corner; celt_tf_select_can_affect
  returning false on empty band sets and on the redundant 2.5 ms
  rows; returning false on 10 ms non-transient with all-choice 0
  bands and true as soon as any band picks choice = 1;
  returning true on 20 ms transient for any non-empty band set;
  TfDirection::from_adjustment classification + levels() value
  matching adj.unsigned_abs() over [-3, 3];
  IncreaseFrequency never reachable on non-transient frames;
  IncreaseTime always reached for non-transient choice = 1.