Align dataset card figure with paper website

.gitattributes

@@ -1,2 +1,3 @@
 *.gz filter=lfs diff=lfs merge=lfs -text
 *.pdf filter=lfs diff=lfs merge=lfs -text
+construction-pipeline.png filter=lfs diff=lfs merge=lfs -text

DATASET_SHA256SUMS

@@ -1,9 +1,9 @@
 5f57f7afac7085eaba4531adf60c2a5e601cba072b88f36bf413fca7d9ab854a  .gitattributes
 9f81b176c98938ed57725b85862d1b9590bf44b0d77790f75954079cc926c963  DATASET_MANIFEST.json
 19b67f9c40b138d9303f39b77ed9bc766369cfcd63354a54c7c3afa6dbd821ed  PAPER_INDEX.csv
-e864c4fe1d7f2718974cdf9679a3111beedd3b509d668c6887a7d286619449cb  README.md
+5e65e9e5e38a510d651fde64f32442254217ae0e9e8103a8355584b38c766b9e  README.md
 9d8379edd297c642fb4583e29a326e2d50116431813a9804cd3008cba64c25c7  REDACTION_POLICY.md
-f7e1ea72e5e6ba74052abf5a569e99ebf34df8f1eac28953e98cd5bd8fab1d23  construction-pipeline.svg
+ef9a55ab6fda028a62108c1a8a0c79555b69f79ba7454a815e3ea1f0307c5775  construction-pipeline.png
 7e3079c1246d0003e12e366d2e5a63ac3502a08f11889962a4af5cff787a33b7  task_pool/013-2026.iclr.10007159.pdf
 62304c51c0a9742d8b7489910439b966ce3d12f93b1bad42bcd69b36390eb462  task_pool/016-2025.emnlp.109.pdf
 430be4e1ddb509d5cb0f3b5d081efce1d86f528ff714bc5480b90cd8ad7df7a6  task_pool/017-2026.acl-long.154.pdf

README.md

@@ -25,7 +25,7 @@ size_categories:
 </div>
 
 <div align="center">
-  <img src="construction-pipeline.svg" width="100%" alt="ReproBoundary construction pipeline" />
+  <img src="construction-pipeline.png" width="100%" alt="ReproBoundary construction pipeline from the paper" />
 </div>
 
 ReproBoundary evaluates coding agents on 47 frozen paper-reproduction tasks.
@@ -62,7 +62,7 @@ ReproBoundary-Execution-Trajectories/
 ├── DATASET_SHA256SUMS
 ├── PAPER_INDEX.csv
 ├── REDACTION_POLICY.md
-├── construction-pipeline.svg
+├── construction-pipeline.png
 ├── verify_dataset.py
 ├── task_pool/
 │   └── <project_id>.pdf