feat: minor improvements

[swift1337]

This PR adds various "quality of life" improvements to the codebase

• Rename loadtest bin to catalyst
• Improve Makefile
  • make install
• Consolidate linters & fixers
• Explicit args & env parsing
• Optimize docker builds
• Propagate logger and env to ctx
• Fetch wallet nonces concurrently
• Fetch tx receipts concurrently (opt-in via env var)

Closes STACK-2018

---

Note

CLI and build/CI updates

• Rename loadtest binary to catalyst with new entrypoint at cmd/catalyst; remove old cmd/loadtest
• New config package for flag/env parsing (e.g., CATALYST_CONCURRENT_RECEIPTS, DEV_LOGGING) and context propagation
• Centralized structured logging with file output under /tmp/catalyst; logger/env plumbed via context
• Streamlined Dockerfile (module download cache) and Makefile (build, install, fmt, lint); updated README and .dockerignore
• CI: switch to golangci-lint GitHub Action with a project .golangci.yml

Runtime and performance improvements

• Ethereum: optional concurrent tx receipt collection in metrics; concurrent wallet nonce initialization; improved block/tx logging; tests added for metrics, runner, and tx factory
• Cosmos: inject logger into metrics collector; runner and client minor refactors and logging; small fixes (nonce handling, formatting)

Result handling

• Standardize saving results/logs under /tmp/catalyst with safer file perms

^{Written by Cursor Bugbot for commit 98f5677. This will update automatically on new commits. Configure here.}

[linear]

STACK-2018 catalyst: various QoL improvements

[aljo242]

are there downstream changes that need to be made after we change the binary name? (infra, etc?)

[swift1337]

are there downstream changes that need to be made after we change the binary name? (infra, etc?)

No, we use docker, I updated Dockerfile

[cursor]

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