feat(mem0-plugin): complete all Tier 1-8 spec items, add scheduled dream and bash error detection

- Add /mem0:dream --schedule support via Claude Code /schedule command
  with local launchd/cron fallback for non-cloud users
- Add /mem0:digest --schedule and file output to ~/.mem0/weekly-digest.md
  with digest-history.log for trend tracking
- Add on_post_commit.sh PostToolUse hook: interactive prompt after git
  commit asking user to save change as memory with category suggestion
- Add on_bash_output.sh PostToolUse hook: detects stack traces and error
  patterns in bash command output, injects mem0 search rubric for prior
  occurrences (complements existing user prompt error detection)
- Fix session-end report: now shows per-category breakdown
  "wrote 3 memories (decision 2, anti_pattern 1)" matching spec
- Wire new hooks into all 3 platforms (Claude Code, Cursor, Codex)
- Add post_commit and bash_error telemetry events
- Add CTO demo testing guide with tier-by-tier manual test steps

mem0-plugin/scripts/session_stats.py

@@ -100,7 +100,12 @@ def report() -> str:
         return ""
 
     parts = []
-    parts.append(f"Session: wrote {adds} memories, retrieved {searches}")
+    category_counts = stats.get("category_counts", {})
+    if category_counts:
+        breakdown = ", ".join(f"{c} {n}" for c, n in sorted(category_counts.items(), key=lambda x: -x[1]))
+        parts.append(f"Session: wrote {adds} memories ({breakdown}), retrieved {searches}")
+    else:
+        parts.append(f"Session: wrote {adds} memories, retrieved {searches}")
     if categories:
         parts.append(f"Categories touched: {', '.join(categories)}")