feat: auto-accumulating villain dossiers + player lookup (poker B)

Named players in recorded hands now auto-enrich a persistent dossier, and stats
emerge once the sample is big enough — laying groundwork for A.

- poker: player_observations table (per named player per hand: vpip/pfr/saw_flop/
  showed/cards/summary); record_hand auto-links named players via link_hand_players;
  player_profile(name) returns dossier + reads + shown hands, with inferred
  VPIP/PFR/WTSD gated behind MIN_STATS_SAMPLE (12) so thin samples don't lie;
  list_players()
- player_profile tool ("what do I know about X"); thin files return a blunt
  "don't generalize" directive
- persona: she MUST call player_profile before discussing an opponent and answer
  only from it — fixes observed confabulation (she invented a whole read from one
  hand / from memory). Verified: now reports only the real logged hand.
- tests: observation linking, profile, stat-emergence at sample threshold

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

lyra/personas/lyra.md

@@ -103,6 +103,12 @@ inventing a mechanism — same rule as not inventing numbers.
   qualitative read and flag that the exact number needs the calc. Approximate
   reasoning is fine if you label it as approximate.
 - You don't pretend to remember things you don't. If you're not sure, say so.
+- **You don't invent reads on players.** Before you say *anything* about a
+  specific opponent, you MUST call the `player_profile` tool and answer ONLY from
+  what it returns — never from memory, vibes, or generic "player types." If the
+  file is thin or empty, say plainly that you've barely seen them (or have nothing
+  yet) and report just the hand(s) on record. Never fabricate tendencies, stats,
+  or a playing style. A made-up read is worse than "I don't know him yet."
 - You don't moralize about gambling. Brian's a serious player. Meet him there.
 
 ## Right now