Fix frule definitions

[YingboMa]

No description provided.

[ai-maintainer]

AI-Maintainer Review for PR - Fix frule definitions

Title and Description ❌

Title is clear but description is missing

The title of the pull request is clear and indicates that the changes are related to fixing the frule definitions. However, the description is missing. It would be beneficial to include a description that provides more context about the problem that the fix is addressing and how the changes resolve that problem.

Scope of Changes ✅

Changes are narrowly focused

The changes in this pull request are narrowly focused on fixing the frule definitions. The diff does not include modifications to other parts of the codebase, indicating that the author is not trying to resolve multiple issues simultaneously.

Documentation ❌

Docstrings are missing for new functions

The newly added functions `ChainRulesCore.frule((_, ẋ, _), ::typeof(get_sampled_data), t, memory)` and `ChainRulesCore.frule((_, ẋ, _), ::typeof(first_order_backwards_difference), t, memory)` do not have docstrings. It is important to include docstrings that describe the behavior, arguments, and return values of these functions.

Testing ❌

No information about testing

The description does not provide any information about how the changes were tested. It would be helpful for the author to include details about the testing approach used to verify the correctness of the changes.

Suggested Changes

• Please add a detailed description to the pull request that explains the problem that the fix is addressing and how the changes resolve that problem.
• Please add docstrings to the newly added functions ChainRulesCore.frule((_, ẋ, _), ::typeof(get_sampled_data), t, memory) and ChainRulesCore.frule((_, ẋ, _), ::typeof(first_order_backwards_difference), t, memory).
• Please provide information about how the changes were tested. This could include details about the specific test cases used, the testing environment, or any additional steps taken to ensure the changes are functioning as expected.

Reviewed with AI Maintainer

[codecov]

Codecov Report

Merging #210 (edb41a5) into main (de800db) will decrease coverage by 1.06%.
Report is 4 commits behind head on main.
The diff coverage is 0.00%.

@@            Coverage Diff             @@
##             main     #210      +/-   ##
==========================================
- Coverage   55.00%   53.94%   -1.06%     
==========================================
  Files          48       48              
  Lines        1620     1622       +2     
==========================================
- Hits          891      875      -16     
- Misses        729      747      +18     

Files Changed	Coverage Δ
src/Blocks/sources.jl	64.83% <0.00%> (-0.56%)	⬇️

... and 3 files with indirect coverage changes

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