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* Add CLI commands for remaining pdmt5.dataframe methods Add the following subcommands so the CLI fully covers pdmt5.dataframe's public *_as_df methods: - version - last-error - symbol-info-tick - market-book - order-check (request via inline JSON or @path/to/file.json) - order-send (request via inline JSON or @path/to/file.json) Also export a new parse_request helper for parsing JSON order requests, add tests for every new command, and update the README and docs command tables. Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com> * Bump version to 0.2.0 Co-Authored-By: Claude Haiku 4.5 <noreply@anthropic.com> * Address PR review feedback Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com> * Harden CLI error assertions Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com> --------- Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com> Co-authored-by: Claude Haiku 4.5 <noreply@anthropic.com>