parser: refactor startup logic inside of persistent work mode boundary

[pcj]

scalafileextract: args: [@bazel-out/darwin_arm64-fastbuild/bin/trumid/common/types/slick/scala_files.pb-0.params]
scalafileextract: parsedArgs: [--rule_kind=scala_files --rule_label=@@//trumid/common/types/slick:scala_files --output_file bazel-out/darwin_arm64-fastbuild/bin/trumid/common/types/slick/scala_files.pb trumid/common/types/slick/Implicits.scala trumid/common/types/slick/ImplicitsTests.scala]
scalafileextract: starting parser: timeout waiting to connect to scala parse server localhost:64188 within 10s
Target //:gazelle failed to build