op-chain-ops: Remove old TODO

feat(indexer): configurable confirmation depth when traversing headers

fix(indexer): run bridge processor after completed L1ETL intervals

op-program: Use atomic write pattern for KV store

fix(indexer): cursoring options when scanning bridge transfers

[epociask/indexer.architecture] Indexer Architectural Docs

Add cannon-prestate as prereq to devnet-up

The devnet-up ultimately requires the cannont-prestate target to have
already executed, or the script errors out.  Consequently, for someone
checking out the repo if they simply do a:

```
make && make devnet-up
```

Things still fail.  This change simply mirrors a similar check added to
the e2e Makefile.

Ensures that pre-image files are always completely written before being moved into place.

op-program: Support prefetching l2-transactions

feat(indexer): wire up rpc client metrics

fix(indexer): Use subsystem rather than label to differentiate between l1/l2

ci: Require cannon-go-lint-and-test to pass before merging

op-wheel: add engine-api utils