Addresses review feedback on cursor.py:
- Extract the inline escape chain into _apply_wire_compatible_json_escapes()
with a comment pinning it to the wire format's escape set, so the parity
intent is explicit rather than reading as an ad-hoc transform.
- Raise MAX_ENCODED_CURSOR_LENGTH to 8192 (comfortably above the ~5.2KB
worst-case the per-field caps can produce) and drop the mint-time length
guard. Encoder/decoder symmetry now holds by construction: the encoder
can't produce a cursor the decode path rejects, so there is no confusing
user-visible 'cursor too long' failure at mint time.
- Rewrite the two over-wire-cap tests to assert worst-case multibyte and
escape-heavy values mint and round-trip, instead of being rejected.
f7558232fa