chore: release v0.6.6

[MagicalTux]

🤖 New release

• compcol: 0.6.5 -> 0.6.6 (✓ API compatible changes)

Changelog

0.6.6 - 2026-06-27

Added

• (qpack) dynamic-table encoder driving the encoder stream

Added

• (qpack) dynamic-table encoder: QpackEncoder::with_dynamic_table + encode
  drive the encoder stream (Set Dynamic Table Capacity, Insert with
  Name Reference against static/dynamic names, Insert with Literal Name) and
  emit field sections with dynamic indexed / name-reference representations and
  a non-zero Required Insert Count. Entries referenced by a field section are
  never evicted by inserts in the same batch; sensitive fields stay out of the
  table (never-indexed). The previous static-only encode_field_section path is
  unchanged. QPACK is now fully bidirectional (encode + decode, static +
  dynamic), matching HPACK.

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