notes from prod run of file de-dupe

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+See notes and scripts about `file_sha1_dedupe` cleanup for prep details.
+
+## Prod Run
+
+Run as `cleanup-bot`:
+
+    export FATCAT_AUTH_API_TOKEN=[...]
+
+    git log | head -n1
+    # commit 5bc5eeed5e3ba54c2129c4233b881291c5fa7449
+
+First do a sample in dry-run mode:
+
+    head -n25 /srv/fatcat/datasets/file_sha1_dupes.json \
+        | python -m fatcat_tools.mergers.files --editgroup-description-override "Automated merging of file entities with duplicate SHA-1 hashes" --dry-run merge-files -
+    # Counter({'updated-entities': 59, 'lines': 25, 'merged': 25, 'skip': 0, 'updated-total': 0})
+
+Gah, the dry-run mode still creates (empty) editgroups:
+
+    https://fatcat.wiki/editgroup/iqzjg3vxu5elvotknmmjln3gv4
+    https://fatcat.wiki/editgroup/2mxsl7lxo5dezem42whnr7zxxe
+
+Actually run (merge) the sample:
+
+    head -n25 /srv/fatcat/datasets/file_sha1_dupes.json \
+        | python -m fatcat_tools.mergers.files --editgroup-description-override "Automated merging of file entities with duplicate SHA-1 hashes" merge-files -
+    # Counter({'updated-entities': 59, 'lines': 25, 'merged': 25, 'skip': 0, 'updated-total': 0})
+
+
+Run the full batch:
+
+    cat /srv/fatcat/datasets/file_sha1_dupes.json \
+        | python -m fatcat_tools.mergers.files --editgroup-description-override "Automated merging of file entities with duplicate SHA-1 hashes" merge-files -
+    # Counter({'updated-entities': 6197, 'lines': 2039, 'merged': 2014, 'skip': 25, 'skip-not-active-entity': 25, 'updated-total': 0})