chore(people): wire one-shot prod merge of duplicate Person records (#1275)

Add the reviewed dedup_decisions.csv (13 merges + 2 jasminezhang keeps; ids
only) and a PROD-gated one-shot in docker-entrypoint.sh that runs
merge_duplicate_people --apply before recompute_url_names. Gated to
DJANGO_ENV=PROD (the decisions file is keyed by production ids) with the
command's name-mismatch guard as a backstop. Validated end-to-end against a
copy of the prod dump: 589->576 people, url_name collisions 10->0, duplicate
clusters reduced to the two intended namesakes.

Remove this one-shot in a follow-up once the first prod deploy confirms the
merge in /logs (the command is idempotent, so a lingering run is a no-op).

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

Author: jonfroehlich

dedup_decisions.csv

@@ -0,0 +1,16 @@
+source_id,action,target_id,note
+328,merge,564,jennifermankoff: keep 564 (UW email + more refs)
+624,merge,498,jasonyip: keep 498 (7 refs vs 1)
+649,merge,652,hangdo: keep 652 (richer; 649 has 1 ref)
+719,merge,718,qingshen: 719 is a 0-ref shell
+709,merge,710,claudinadegyves: 709 is a 0-ref shell
+626,merge,625,jiahaoli: 626 is a 0-ref shell
+627,merge,625,jiahaoli: 627 is a 0-ref shell
+643,merge,644,mikesinclair: 643 is a 0-ref shell
+645,merge,644,mikesinclair: 645 is a 0-ref shell
+723,merge,670,erictokuda: keep 670 (older; both refs=1)
+724,merge,707,heatherfeldner: keep 707 (older; both refs=1)
+581,merge,623,wendyroldan: keep 623 (real headshot; scalar fields backfill from 581)
+720,merge,669,claudiosilva: revealed by the NFKD accent fix; keep 669 (correct spelling)
+840,keep,,jasminezhang: genuine namesake - leave separate (#1206)
+869,keep,,jasminezhang: genuine namesake - leave separate (#1206)

docker-entrypoint.sh

@@ -116,7 +116,18 @@ echo "******************************************"
 python manage.py backfill_project_visibility
 
 echo "****************** STEP 4.8/5: docker-entrypoint.sh ************************"
-echo "4.8 Running 'python manage.py recompute_url_names' to de-collide historical url_names (#1206)"
+echo "4.8 Running 'python manage.py merge_duplicate_people' (PROD only) to consolidate duplicate Person records (#1275)"
+echo "******************************************"
+# ONE-SHOT (remove after the first prod run confirms in /logs). Gated to PROD
+# because dedup_decisions.csv is keyed by production ids; the merge command also
+# refuses name-mismatched pairs as a backstop. Idempotent, so a lingering run is
+# a harmless no-op once the duplicates are already merged.
+if [ "$DJANGO_ENV" = "PROD" ]; then
+  python manage.py merge_duplicate_people --decisions dedup_decisions.csv --apply
+fi
+
+echo "****************** STEP 4.9/5: docker-entrypoint.sh ************************"
+echo "4.9 Running 'python manage.py recompute_url_names' to de-collide historical url_names (#1206)"
 echo "******************************************"
 python manage.py recompute_url_names