Add tail-style log reader and -n flag

[simpx]

Summary

• speed up pmo log by reading from file end like tail
• add -n/--lines option and optional -f/--follow flag
• document new flags and update tests

Testing

• uv run pytest tests/test_advanced.py tests/test_cli.py tests/test_config.py tests/test_extends.py
• uv run pytest tests/test_logs.py tests/test_process_monitoring.py tests/test_util.py tests/test_service_management.py
• uv run pytest tests/test_integration.py -vv -s

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https://chatgpt.com/codex/tasks/task_e_68ba3fa485688329a13b2d52196645a7

[Copilot]

Pull Request Overview

This PR enhances the log command functionality by adding tail-style log reading for improved performance and new command-line options for better user control.

• Replaces the --no-follow flag with a more intuitive -f/--follow flag
• Adds a -n/--lines option for specifying the number of log lines to display
• Implements efficient tail-style log reading using binary file operations

Reviewed Changes

Copilot reviewed 5 out of 5 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
pmo/cli.py	Updates argument parser to use -f/--follow and -n/--lines flags
pmo/logs.py	Implements efficient binary file reading for tail functionality
tests/test_cli.py	Updates test cases to use new follow parameter instead of no_follow
tests/test_integration.py	Updates integration test to use new follow parameter
README.md	Documents the new -f and -n flags for the logs command

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[Copilot]

[nitpick] The slice assignment buffer[:0] = is not immediately clear. Consider using buffer = file.read(read_size) + buffer or adding a comment explaining that this prepends data to the buffer.

Suggested change

	buffer[:0] = file.read(read_size)
	buffer = file.read(read_size) + buffer # Prepend read data to buffer