Charge Late Chips for bartender drinks

[mpiorowski]

Summary

• Adds paid @bartender drink orders backed by Late Chips, with server-side price limits, a chip floor guard, and persistent per-user drink state.
• Shows a decaying drunkenness tint on clubhouse username labels and chat author labels after users buy drinks.

Changes

• Adds user_drinks persistence for drink count, lifetime spend, raw drunk points, and decay-at-read drunk level.
• Adds ChipService::buy_drink to atomically debit chips and record buzz, with drink purchases written to the chip ledger.
• Updates @bartender mentions to use structured AI order decisions for pour, offer, or chat; only successful pours charge chips.
• Propagates drunk levels through the shared clubhouse lobby and chat row rendering.
• Queues bartender banner messages so bursts of replies display one at a time instead of replacing each other.

Behavior notes

• Drink prices are AI-selected but server-clamped to 100-2000 chips and cannot reduce a user below the 100-chip floor.
• If the AI order call times out or the user can no longer afford the drink when charged, no chips are deducted.
• Drunk points decay over time without a background sober-up write; active drunk state is periodically reseeded from the DB.

Feature flags

• None

Screenshots / Video

• Not included in this draft; attach before review.

Testing

• Automated: Added coverage for drink decay/levels, drink ledger and chip-floor behavior, atomic drink purchase composition, bartender order parsing, lobby drunk-level decay, bartender banner queueing, and chat row cache invalidation for drunk tint changes. Not run here per repo policy.
• Manual: Not run; PR draft generated from the provided diff context.