Add digest command to email processor

Read-only summary of recent decisions, grouped by action with
[auto]/[user] markers. Supports --recent N for multi-day lookback.

scripts/email_processor/decision_store.py

@@ -14,7 +14,7 @@ auto decision.
 
 import json
 import re
-from datetime import datetime
+from datetime import datetime, timedelta
 from pathlib import Path
 from collections import Counter
 
@@ -200,6 +200,33 @@ def get_known_labels():
     return labels
 
 
+def get_recent_decisions(days=1):
+    """Return recent decisions grouped by action.
+
+    Args:
+        days: number of days to look back (default 1 = today).
+
+    Returns:
+        dict of action -> list of entries, e.g. {"delete": [...], "archive": [...]}.
+        Returns empty dict if no decisions found in the period.
+    """
+    history = _load_history()
+    if not history:
+        return {}
+
+    cutoff = datetime.now() - timedelta(days=days)
+    grouped = {}
+    for entry in history:
+        try:
+            ts = datetime.fromisoformat(entry["timestamp"])
+        except (KeyError, ValueError):
+            continue
+        if ts >= cutoff:
+            action = entry.get("action", "unknown")
+            grouped.setdefault(action, []).append(entry)
+    return grouped
+
+
 def get_all_stats():
     """Compute aggregate statistics across the full decision history.