This commit does a few important things to speedup startup times:
1. We avoid changing an Arc<str> to a String with the series key as the
   From<String> impl will call with_column which will then turn it into
   an Arc<str> again. Instead we can just call `with_column` directly
   and pass in the iterator without also collecting into a Vec<String>
2. We switch to using bitcode as the serialization format for the WAL.
   This significantly reduces startup time as this format is faster to
   use instead of JSON, which was eating up massive amounts of time.
   Part of this change involves not using the tag feature of serde as
   it's currently not supported by bincode
3. We also parallelize reading and deserializing the WAL files before
   we then apply them in order. This reduces time waiting on IO and we
   eagerly evaluate each spawned task in order as much as possible.

This gives us about a 189% speedup over what we were doing before.

Closes #25534

This commit does a few important things to speedup startup times:
1. We avoid changing an Arc<str> to a String with the series key as the
   From<String> impl will call with_column which will then turn it into
   an Arc<str> again. Instead we can just call `with_column` directly
   and pass in the iterator without also collecting into a Vec<String>
2. We switch to using bitcode as the serialization format for the WAL.
   This significantly reduces startup time as this format is faster to
   use instead of JSON, which was eating up massive amounts of time.
   Part of this change involves not using the tag feature of serde as
   it's currently not supported by bincode
3. We also parallelize reading and deserializing the WAL files before
   we then apply them in order. This reduces time waiting on IO and we
   eagerly evaluate each spawned task in order as much as possible.

This gives us about a 189% speedup over what we were doing before.

Closes #25534

This commit does a few important things to speedup startup times:
1. We avoid changing an Arc<str> to a String with the series key as the
   From<String> impl will call with_column which will then turn it into
   an Arc<str> again. Instead we can just call `with_column` directly
   and pass in the iterator without also collecting into a Vec<String>
2. We switch to using bitcode as the serialization format for the WAL.
   This significantly reduces startup time as this format is faster to
   use instead of JSON, which was eating up massive amounts of time.
   Part of this change involves not using the tag feature of serde as
   it's currently not supported by bincode
3. We also parallelize reading and deserializing the WAL files before
   we then apply them in order. This reduces time waiting on IO and we
   eagerly evaluate each spawned task in order as much as possible.

This gives us about a 189% speedup over what we were doing before.

Closes #25534