fix: fix inconsistency in canbench summary report

[maksymar]

This PR fixes #106 by moving results analysis fully into the canbench binary, removing it from the run script.

Changes:

• Uploads CSV report as a job artifact and links it in the summary report
• Adds explicit status into metric summary
• Removes empty first line from the report output
• Fills empty cells in the CSV report

Tested on stable-structures PR #301.

[github-actions]

canbench 🏋 (dir: examples/fibonacci) 3289196 2025-05-13 08:21:32 UTC

✅ examples/fibonacci/canbench_results.yml is up to date
📦 canbench_results_benchmark-fibonacci-example.csv available in artifacts

---------------------------------------------------

Summary:
  instructions:
    status:   No significant changes detected 👍
    counts:   [total 5 | new 0 | improved 0 | regressed 0 | unchanged 5]
    change:   [min 0 | med 0 | max 0]
    change %: [min 0.00% | med 0.00% | max 0.00%]

  heap_increase:
    status:   No significant changes detected 👍
    counts:   [total 5 | new 0 | improved 0 | regressed 0 | unchanged 5]
    change:   [min 0 | med 0 | max 0]
    change %: [min 0.00% | med 0.00% | max 0.00%]

  stable_memory_increase:
    status:   No significant changes detected 👍
    counts:   [total 5 | new 0 | improved 0 | regressed 0 | unchanged 5]
    change:   [min 0 | med 0 | max 0]
    change %: [min 0.00% | med 0.00% | max 0.00%]

---------------------------------------------------
Successfully saved CSV results to canbench_results.csv

[github-actions]

canbench 🏋 (dir: examples/btreemap_vs_hashmap) 3289196 2025-05-13 08:21:32 UTC

✅ examples/btreemap_vs_hashmap/canbench_results.yml is up to date
📦 canbench_results_benchmark-btreemap-vs-hashmap-example.csv available in artifacts

---------------------------------------------------

Summary:
  instructions:
    status:   No significant changes detected 👍
    counts:   [total 3 | new 0 | improved 0 | regressed 0 | unchanged 3]
    change:   [min 0 | med 0 | max 0]
    change %: [min 0.00% | med 0.00% | max 0.00%]

  heap_increase:
    status:   No significant changes detected 👍
    counts:   [total 3 | new 0 | improved 0 | regressed 0 | unchanged 3]
    change:   [min 0 | med 0 | max 0]
    change %: [min 0.00% | med 0.00% | max 0.00%]

  stable_memory_increase:
    status:   No significant changes detected 👍
    counts:   [total 3 | new 0 | improved 0 | regressed 0 | unchanged 3]
    change:   [min 0 | med 0 | max 0]
    change %: [min 0.00% | med 0.00% | max 0.00%]

---------------------------------------------------
Successfully saved CSV results to canbench_results.csv

[Copilot]

Pull Request Overview

This PR fixes inconsistencies in the canbench summary report output by adding a descriptive "status" field and standardizing percentage change reporting across expected output files, as well as making minor improvements in production code. Key changes include:

• Updating expected report files to include a new "status" line with descriptive text and replacing "n/a" with computed percentage changes.
• Modifying the summary reporting in src/summary.rs to use status strings and infinity values in cases with zero baselines.
• Renaming CSV headers in src/csv_file.rs and updating CI workflows to upload CSV artifacts.

Reviewed Changes

Copilot reviewed 23 out of 23 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
canbench-bin/tests/expected/*.txt	Adjusted expected outputs to include a new "status" field and explicit change percentage values.
canbench-bin/src/summary.rs	Updated status handling in the summary report and pushed infinity values when comparing against a zero baseline.
canbench-bin/src/lib.rs	Adjusted newline placements when printing results to refine spacing.
canbench-bin/src/csv_file.rs	Renamed CSV header fields and modified the percentage formatting function for clarity.
.github/workflows/ci.yml	Added steps to upload CSV results artifacts.

Comments suppressed due to low confidence (1)

canbench-bin/src/lib.rs:123

• [nitpick] Verify that the adjustment to newline placement in the show_results block still produces the intended output formatting.

if show_results { println!("---------------------------------------------------"); ... }