research: score Jev intent variants with the previous turn

The earlier report had no previous-turn rows. This run measures V0, V1, V2, and Flash on the re-extracted corpus and records that the real sample is not representative of the simulated set.

Co-authored-by: Cursor <cursoragent@cursor.com>

scripts/research/jev_intent_cache.py

@@ -0,0 +1,25 @@
+"""Gitignored cache directory for the Jev intent research.
+
+The 09-19 run stored rows on a Windows path. This machine uses the repo
+`.cache/jev_intent/` directory, which is already gitignored. Set
+`JEV_INTENT_CACHE` to point at an existing cache without writing it into
+the repository.
+"""
+
+from __future__ import annotations
+
+import os
+from pathlib import Path
+
+ROOT = Path(__file__).resolve().parents[2]
+WINDOWS_CACHE = Path(r"G:\Ferti\Jyotisha\.cache\jev_intent")
+
+
+def cache_dir() -> Path:
+    override = os.environ.get("JEV_INTENT_CACHE")
+    if override:
+        return Path(override)
+    local = ROOT / ".cache" / "jev_intent"
+    if WINDOWS_CACHE.is_dir() and not local.exists():
+        return WINDOWS_CACHE
+    return local