Non breaking changes to ARC60 to support PQ schemes. CAIP was also
removed and replaced with a security section noting that address auth is
non-trivial on Algorand due to rekeying. A future ARC that leverages
ARC60 can standardize SIWA

The persisted state is mostly the votes of the round's steps, and it
holds their content several times over: every vote carries the proposal
value, the bundle that proved a threshold repeats the signatures of the
votes that formed it, and msgpack writes every field name. zstd at
level 3 replaces the repeats with references and leaves the signatures
and proofs: a mainnet snapshot shrinks from 433 KB to 105 KB, for
0.75 ms to encode and 0.25 ms to decode. The snapshot is written twice
per round, so this removes most of the crash database's disk writes.

decode recognizes a zstd frame by its magic number and still reads the
uncompressed snapshots of earlier releases.

Add MakeLongWALAccessor, whose connections checkpoint the write-ahead
log every 8192 frames instead of SQLite's 1000.

The net result is checkpoint happens less frequently reducing number of pages written.

At the current mainnet state it is reduction from 22% WAL pages down to 3% copied.