Improve performance of row ids

[jsdt]

Description of Changes

This makes a few performance improvements. It is pretty similar to #179. The key changes are:

• This updates how rowIds are created. For tables with a primary key, it is the primary key value. Otherwise it is a base64 encoding of the whole row. Previously the rowId was always a string representation of the entire row, even if we had a primary key.
• This gets rid of the very slow OperationsMap, replacing it with a standard Map. This is done by defining a way to turn any AlgebraicValue into a primitive that can be used as a Map key. This conversion is basically free for any primary keys, since they have primitive values.

This also has the fix of using concat instead of push(... that was in #179.

Since I was already making some changes in the TableCache, I added some more context to log messages, so hopefully any future bug reports will be easier to look into.

These changes also give us a way to make find efficient, but I didn't put it in this PR.

Requires SpacetimeDB PRs

Requires this codegen change clockworklabs/SpacetimeDB#2671, so we need to wait for the next release.

Testing

This has some coverage in unit tests, and has some manual testing with the quickstart, but more testing should be added before merging.

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