Migrate the MY CLUB stat set from the Python proxy to a Rust handler computing
Core-accurate counts: player tiers + rare from the collection, staff/consumable
families from catalog kind+subtype, per-nation buckets via the reverse entity
resolver. Faithful port of fut_club_stats.py (VOCAB + global_counts +
context_rows). Unlike the oracle (stale profile + synthetic consumable shelf),
this reflects the real imported content (incl. the content-gap consumables/staff).
Fail-closed 503 on Core error. club/stats/country|league|team sub-screens remain
Python (documented). Adds adapter club_stats module (5 tests), host handler +
classify arm + resolver subtype_of/rareflag_of, ownership + integration tests;
reachability tool splits club/stats global(migrated) vs context(residual).
Migrate GET /hub from the Python proxy to a Rust handler deriving counts from
authoritative state: clubPlayers = owned PLAYER cards in Core (consumables/staff
excluded via catalog kind; may be lower than Python's profile count by the
deferred Legend instances = DIFFERENT-BY-DESIGN), auction/tradePile counts from
the durable market store via the async bridge. Fail-closed 503 on Core error;
market read failure degrades cosmetic counts to 0. Adds classify arm, handler,
ownership + integration tests; reachability tool marks hub migrated.
funman300