fix: evo_run004_champion fitness inflated by token value (#670) (#704)

- Add fitness_flags="token_value_inflation" to evo_run004_champion in
  manifest.jsonl so callers can detect the inflated value without
  discarding the entry entirely.
- Add effective_fitness() helper in evolve.sh pool admission (step 5)
  that returns 0 for any entry with a token_value_inflation flag,
  preventing inflated scores from biasing the top-100 evolved pool
  ranking or eviction decisions.
- Document in evolve.sh that raw fitness values are only comparable
  within the same evaluation run.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

tools/push3-evolution/evolve.sh

@@ -828,9 +828,19 @@ if not new_items:
     sys.exit(0)
 
 # ── 5. Separate pinned (hand-written) from evolved; top-100 cap on evolved only
-pinned  = [(int(e.get('fitness') or 0), e, None) for e in existing
+#
+# NOTE: raw fitness values are only comparable within the same evaluation run.
+# Entries with fitness_flags='token_value_inflation' (or other flags) are ranked
+# as fitness=0 so that inflated scores do not bias pool admission or eviction.
+def effective_fitness(entry):
+    flags = entry.get('fitness_flags') or ''
+    if 'token_value_inflation' in flags:
+        return 0
+    return int(entry.get('fitness') or 0)
+
+pinned  = [(effective_fitness(e), e, None) for e in existing
            if e.get('origin') != 'evolved']
-evolved = [(int(e.get('fitness') or 0), e, None) for e in existing
+evolved = [(effective_fitness(e), e, None) for e in existing
            if e.get('origin') == 'evolved']
 for fitness, push3_path, entry in new_items:
     evolved.append((fitness, entry, push3_path))