Python PDF Grader Script

I have a batch of student answer sheets saved as PDFs. Each file contains short, text-based responses. I need a single, self-contained Python script that will:

• Extract the text from every PDF in a given folder (use a reliable open-source library such as pdfplumber or PyPDF2).
• Compare each response against a set of predefined keywords or phrases that I will supply in a separate JSON or CSV answer key.
• Assign scores automatically based on keyword matches (simple rule-based grading is fine—no machine-learning needed).
• Produce a concise summary report for every file, capturing the overall score and any missed keywords, then save the results to either CSV or JSON. Printing to console as an option is a plus.

Acceptance criteria
• Script runs from the command line with a clear README explaining required packages and usage.
• Works on Python 3.10+ without proprietary dependencies.
• Handles at least 100 PDFs in one run without crashing or leaking memory.
• Summary report matches my sample output format exactly.

If you have experience with text extraction, keyword scoring, and tidy reporting, this should be a quick, straightforward build.