Session 48: Name normalization at every layer + usage field (2156 tests)

Trace-first: the normalizer functions were correct (S47) but raw names still
flowed through paths that skipped them. Fixed each leaking path.

- 2a (source chokepoint): snapshotService.runSnapshot normalizes each grade's
  player to the de-dotted display AND dedupes to one grade per nameKey|stat
  (highest confidence) before writing grades:{sport} + snapshot:latest. Every
  consumer (GameCard, Explore, leaders, profile) now gets clean merged names.
- 2b: buildPlayerStripsFromProps dedupes a player's props by stat (graded >
  awaiting) → one row per stat (kills "Ks 5.5 AND Ks 3.5" variant dupes).
- 2c: scan tonightsPlayers grid groups by nameKey, displays normalized name.
- 3: profile VYNDR INTELLIGENCE "+0%"/"—" was buildIntel's defaults (separate
  from the grade card's buildIntelFields, which already works). resolvePlayerStats
  now attaches real usage (AB/G) + rest (B2B/Xd); buildIntel renders them; REST
  default is now "—".

Backend 2149 -> 2156 tests (+7), 181 suites. Web build clean (exit 0).

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

CLAUDE.md

@@ -493,6 +493,25 @@ snapshot, locked to the line, and read from cache.
   moderate). If you re-tune archetype thresholds, remember season totals are
   partial mid-season — don't use full-season cutoffs.
 
+## Normalization Chokepoints (Session 48 — non-obvious)
+- **The snapshot is the normalization SOURCE.** `snapshotService.runSnapshot`
+  normalizes every grade's player to `normalizeName().display` AND dedupes to one
+  grade per `nameKey|stat_type` (highest confidence) before writing
+  `grades:{sport}` + `snapshot:{sport}:latest`. So GameCard overlay, Explore,
+  leaders, and profile activeProps ALL inherit clean, merged names — don't add
+  per-consumer normalization, fix it here.
+- **Three paths that needed it (all fixed):** snapshot grades (above);
+  `buildPlayerStripsFromProps` dedupes a player's props by stat (graded > awaiting);
+  scan `tonightsPlayers` groups by `nameKey`. If a NEW surface lists players,
+  group by `nameKey` + display `normalizeName().display`.
+- **TWO intel renderers — don't confuse them:** the GRADE CARD (scan) uses
+  `analyzeViaEngine1.buildIntelFields(features)`; the PLAYER PROFILE uses
+  `playerIntelService.buildIntel(stats)`. The "+0%"/"—" bug was the PROFILE's
+  defaults — fixed by `resolvePlayerStats` attaching real `usage` (AB/G) + `rest`
+  and `buildIntel` reading them. The grade card already worked (the full feature
+  merge carries ab_per_game/rest_days; `FEATURE_NAMES` is meta bookkeeping only,
+  NOT a whitelist that filters the vector).
+
 ## Active Skills
 - vyndr-voice (all user-facing output)
 - prop-analysis (grading methodology)