Bump transfermarkt-scraper to latest main and fix clubs merge

Update the pinned transfermarkt-scraper git dependency to the latest
main commit, which brings a crawlee 1.6.0 -> 1.9.0 bump.

The new scraper version's clubs output made parent.average_market_value
type as JSON instead of VARCHAR in some scrapes, breaking the DuckDB
UNION ALL BY NAME merge with existing raw data. Add 'clubs' to
JSON_CASTS to normalize the parent struct, matching the same treatment
already applied to players, games, game_lineups, appearances, and
national_team_players.

Author: David

poetry.lock

@@ -109,6 +109,7 @@ def all(cls):
 # Casting to JSON normalises the type and avoids UNION ALL BY NAME conflicts.
 # Safe to do because base models only ever access these via json_extract_string().
 JSON_CASTS = {
+  'clubs': ['parent'],
   'players': ['parent'],
   'games': ['parent'],
   'game_lineups': ['parent'],