Connexion DuckDB globale, verrou fcntl et query_marches

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- _ensure_database : vérifie rebuild sous verrou fcntl exclusif
- conn en lecture seule au niveau module, schema importé via SELECT LIMIT 0
- query_marches : helper SQL paramétré retournant un pl.DataFrame
- get_cursor : cursor par appel pour thread-safety Dash
- pyarrow ajouté en dépendance (requis par duckdb .pl())

refs #71

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

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Colin Maudry

2026-04-15 16:23:09 +02:00

parent 077af6dd2e

commit f31522734c

4 changed files with 2576 additions and 2 deletions

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