fix: make RAG file-type detection case-insensitive

[xbrxr03]

Closes #6399

Problem: DataTypes.from_content() uses case-sensitive path.endswith(ext) against a lowercase-only extension map. Files with uppercase/mixed-case extensions (.PDF, .CSV, .DOCX) are silently misrouted to the text loader, causing raw binary bytes to be chunked and embedded into the RAG store instead of parsed document text.

Fix: Lowercase the path before extension matching:

lower_path = path.lower()
for ext, dtype in mapping.items():
    if lower_path.endswith(ext):
        return dtype

Before:

Input	Detected	Correct
report.PDF	text_file	pdf_file
data.CSV	text_file	csv
doc.DOCX	text_file	docx

After: All resolve correctly regardless of case.

This is a single-line change with no behavioral impact for already-correct lowercase paths.

AI-assisted: written with the help of an AI coding agent (OpenClaw/GlM-5.1).

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ℹ️ Recent review info

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Run ID: 49924e1d-0d8b-4a3d-a3a6-a3a1fe13abb7

📥 Commits

Reviewing files that changed from the base of the PR and between 289686a and 2a11d43.

📒 Files selected for processing (1)

• lib/crewai-tools/src/crewai_tools/rag/data_types.py

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📝 Walkthrough

Walkthrough

The get_file_type() function in data_types.py now lowercases the input path before matching file extensions, making extension detection case-insensitive for both filesystem paths and URLs.

Changes

Extension matching fix

Layer / File(s)	Summary
Case-insensitive extension detection lib/crewai-tools/src/crewai_tools/rag/data_types.py	get_file_type() lowercases the path before checking endswith against extension mapping keys, fixing misclassification of uppercase/mixed-case extensions.

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title clearly and concisely describes the main change: making RAG file-type detection case-insensitive.
Description check	✅ Passed	The description directly explains the bug, the fix, and the expected behavior, matching the changeset.
Linked Issues check	✅ Passed	The code change lowercases the path before extension matching, satisfying the linked issue's case-insensitive detection requirement.
Out of Scope Changes check	✅ Passed	The PR appears narrowly scoped to the file-type detection fix and introduces no unrelated changes.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.

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• Create PR with unit tests

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