Make data.cdc.gov data pull helpers more generic and use httr2.

[dylanhmorris]

Closes #156

Prerequisite for #148 ; decided to separate this off for ease of review.

• Replaces httr with httr2 and httptest with httptest2
• Makes pull_nhsn() into a light wrapper of more generic functions for API calls in general and interactions with data.cdc.gov in particular

[codecov]

Codecov Report

Attention: Patch coverage is 90.74074% with 5 lines in your changes missing coverage. Please review.

Project coverage is 64.29%. Comparing base (d7105bb) to head (a2920ef).
Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
R/pull_data_cdc_gov.R	90.74%	5 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #155      +/-   ##
==========================================
+ Coverage   63.76%   64.29%   +0.52%     
==========================================
  Files          28       28              
  Lines        1551     1574      +23     
==========================================
+ Hits          989     1012      +23     
  Misses        562      562              

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[Copilot]

Pull Request Overview

This PR refactors the data pull helpers for data.cdc.gov to be more generic, replacing the previous httr-based implementation with a new httr2‐based workflow. In addition, it updates the documentation, tests, and API endpoint configuration to support the new design.

• Updated vignette chunks to use httptest2 and removed obsolete httr calls.
• Introduced functions for constructing data.cdc.gov endpoints and managing API credentials.
• Revised tests and data mocks to align with the new API request implementations.

Reviewed Changes

Copilot reviewed 20 out of 20 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
vignettes/pull-nhsn.Rmd	Updated chunk labels and switched to httptest2; duplicate ENV assignment noted.
tests/testthat/*	Added tests for warning behavior and replaced httptest with httptest2.
R/pull_data_cdc_gov.R	Migrated API requests from httr to httr2 and improved error-handling logic.
man/*.Rd & R/constants.R	Updated documentation to reference new functions and dataset IDs.
NAMESPACE & DESCRIPTION	Updated exports and dependencies to reflect changes with httr2 and httptest2.

Comments suppressed due to low confidence (1)

R/pull_data_cdc_gov.R:193

• Ensure that checking nrow(df) >= limit correctly captures the case where the query result is exactly at the limit, which could indicate truncated data. Verify that this behavior is intended or consider providing additional guidance in the documentation.

if (error_on_limit && nrow(df) >= limit) {

[sbidari]

LGTM! Thanks @dylanhmorris