Add pindexer support for position timelines in the DEX explorer (#4946)

## Describe your changes

These changes index the states of individual positions, allowing the dex
explorer to render position timelines, allowing users to inspect their
position history.

This also updates sqlx along the way.

Once these changes are merged, we'll need to trigger a reindex on the
dev indexer.

## Checklist before requesting a review

- [x] If this code contains consensus-breaking changes, I have added the
"consensus-breaking" label. Otherwise, I declare my belief that there
are not consensus-breaking changes, for the following reason:

  > indexer changes only

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Co-authored-by: Lucas Meier <[email protected]>