store: Fix: Remove dead roster fields from CSV in paper-dynasty-database v1_cards_get_one

graph/fixes/fix-remove-dead-roster-fields-from-csv-in-paper-dynasty-data-475fcd.md

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+---
+id: 475fcd0d-8d29-471b-a6e3-f3face5320c9
+type: fix
+title: "Fix: Remove dead roster fields from CSV in paper-dynasty-database v1_cards_get_one"
+tags: [paper-dynasty, paper-dynasty-database, python, fastapi, fix, csv, dead-code]
+importance: 0.5
+confidence: 0.8
+created: "2026-03-03T19:37:39.735071+00:00"
+updated: "2026-03-03T19:37:39.735071+00:00"
+---
+
+## Problem
+
+`GET /api/v2/cards/{card_id}?csv=true` raised `AttributeError` at runtime because `v1_cards_get_one` referenced `this_card.roster1.name`, `this_card.roster2.name`, `this_card.roster3.name` — fields that do not exist on the `Card` model.
+
+## Root Cause
+
+Dead code referencing removed/never-implemented roster relationship fields on the `Card` ORM model. The `Card` model only has `player`, `team`, `pack`, `value`.
+
+## Solution
+
+Removed `roster1`, `roster2`, `roster3` from both the CSV header row and data row in `v1_cards_get_one` (`app/routers_v2/cards.py`).
+
+## Files Changed
+
+- `app/routers_v2/cards.py` — removed roster columns from CSV output
+
+## Notes
+
+- ruff linter hook reformats entire file on save (single→double quotes, line wrapping) — cosmetic noise in the diff
+- `v1_cards_patch` still accepts `roster1_id`, `roster2_id`, `roster3_id` query params that are silently ignored — tracked as separate cleanup
+- PR: https://git.manticorum.com/cal/paper-dynasty-database/pulls/37