Revert "Revert " Install SDK from PyPI and refactor release publishing"" (#2698)
* Revert "Revert " Install SDK from PyPI and refactor release publishing (#2691…"
This reverts commit e6a7b73a2fa129bc80509c1f7bafcb468e429eb7.
* fix: move .github/README.md to .github/workflows/ to stop shadowing repo README
* fix: remove golangci-lint from go.mod tool directive
golangci-lint v2 is installed via mise (aqua) for local dev and via
golangci-lint-action for CI. The tool directive was pulling in v1 as
an indirect dependency, polluting go.mod with 600+ lines of unnecessary deps.