Add Time-MQA TSQA dataset

[Copilot]

Integrates the TSQA (Time Series Question Answering) pretraining dataset from the Time-MQA paper (ACL 2025) into TSDB. The dataset is hosted on HuggingFace at Time-MQA/TSQA.

Changes

• tsdb/database.py — New "tsqa" entry using an hf:// URL prefix to distinguish HuggingFace-hosted datasets from direct file downloads
• tsdb/utils/downloading.py — download_and_extract() now short-circuits on hf:// URLs (creates the local directory, defers actual download to the loader)
• tsdb/loading_funcs/tsqa.py — New loader using datasets.load_dataset("Time-MQA/TSQA", cache_dir=local_path); returns a dict keyed by split name (train, validation, test) with pandas DataFrames as values. The datasets package is an optional dependency with a clear ImportError if absent.
• tsdb/loading_funcs/__init__.py / tsdb/data_processing.py — Wired up load_tsqa into the standard dispatch chain
• dataset_profiles/tsqa/README.md — Citation metadata

Usage

import tsdb

# requires: pip install datasets
data = tsdb.load("tsqa")
# data.keys() → dict_keys(['train', 'test', ...])
# data['train'] → pandas.DataFrame

This adds the hf:// convention as a lightweight extension point for future HuggingFace-hosted datasets without requiring datasets as a base dependency.

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Original prompt

---

This section details on the original issue you should resolve

<issue_title>Add Time-MQA TSQA dataset</issue_title>
<issue_description>### 1. Dataset description

TSQA from Time-MQA, as a pretraining dataset for time-series llm, should be included in TSDB

@inproceedings{kong2025timemqa,
title={Time-MQA: Time Series Multi-Task Question Answering with Context Enhancement},
author={Kong, Yaxuan and Yang, Yiyuan and Hwang, Yoontae and Du, Wenjie and Zohren, Stefan and Wang, Zhangyang and Jin, Ming and Wen, Qingsong},
booktitle={Proceedings of the 63nd Annual Meeting of the Association for Computational Linguistics},
year={2025}
}

2. Check open-source status

• The dataset is publicly available

3. Provide useful information for the implementation

The dataset is available at https://huggingface.co/datasets/Time-MQA/TSQA</issue_description>

Comments on the Issue (you are @copilot in this section)

• Fixes Add Time-MQA TSQA dataset #100

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Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

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