Reindex Card into ES on printing/tag consensus transitions

[WilfordGrimley]

Summary

Stage 3.5 on top of #9: reindex a card into ES immediately on a printing/tag
vote transition, instead of waiting for the next update_database scan.
Design and implementation detail: docs/features/printing-tags.md's new
"Stage 3.5" section.

• documents.py: reindex_card_safely(card) — failure-isolated ES push,
  shared by both consensus modules.
• printing_consensus.py: reindexes only when the effective indexed
  printing changes (enter/leave RESOLVED, or a changed resolved printing).
• tag_consensus.py: its existing (already transition-gated) ES push now
  goes through the same failure-isolated helper.
• Artist resolution: no ES-indexed field (inferred_canonical_artist/
  artist_vote_status only) — confirmed against documents.py, no hook.

Recovery note

The original session doing this work was killed mid-edit (terminal closed
before it could commit) — reconstructed from its transcript. documents.py
and printing_consensus.py are verbatim recoveries. tag_consensus.py's
docstring edit is verbatim; the call-site swap (CardSearch().update(...)
→ reindex_card_safely(card)) was never reached by the killed session — I
completed it, matching the pattern already established in
printing_consensus.py and required by the original spec's "if yes, same
hook there" for any ES-indexed field. Diffed all three files against the
transcript's edit history to confirm no partial application beyond that one
documented completion.

Verification

• New tests (test_printing_consensus.py::TestResolveAndPersistPrintingReindex):
  unresolved→RESOLVED fires one reindex call; re-resolve to the same outcome
  fires zero; RESOLVED→contested fires one call and the indexed fields
  (get_expansion_code/get_collector_number) clear; an ES exception inside
  reindex_card_safely logs but doesn't block the DB write.
• Full backend suite, real Postgres+ES via testcontainers (not the prod
  stack): 452 tests, 448 passed / 4 failed — the same 4 pre-existing
  secret/fixture-dependent failures Vote-system Stage 3: printing-preferred search consumption #9 documents (2 Moxfield, 2
  FileNotFoundError), no new failures.
• Pre-commit (ruff, isort, black, mypy, prettier) clean on every commit.

🤖 Generated with Claude Code

https://claude.ai/code/session_016i9S7LQsCL3FGaih3ZTRBJ