feat: cron job system for Inara (remind + note types)

- cron_runner.py: job storage (CRONS.json), schedule parsing, execution
- tools/cron.py: cron_list/add/remove/toggle + reminders_clear tools
- scheduler.py: load user crons at startup, expose get_scheduler() for
  live add/remove without restarts
- context_loader.py: auto-include REMINDERS.md in system prompt (tier 2+)
  so cron reminders surface automatically without Inara having to poll
- inara/CRONS.json + REMINDERS.md: backing files (initially empty)

Schedule formats: hourly | daily | daily:HH:MM | weekly:DOW | weekly:DOW:HH:MM
Job types: remind (→ REMINDERS.md) | note (→ SCRATCH.md)

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

cortex/context_loader.py

@@ -57,7 +57,15 @@ def load_context(
     if help_path.exists():
         parts.append(f"--- HELP.md ---\n{help_path.read_text()}")
 
-    # ── 4. Tiered memory — long → mid → short ─────────────────────
+    # ── 4. Pending reminders (tier 2+) ────────────────────────────
+    #    Written by cron jobs; cleared by Inara after acting on them.
+    reminders_path = inara_dir / "REMINDERS.md"
+    if reminders_path.exists() and reminders_path.stat().st_size > 10:
+        content = reminders_path.read_text().strip()
+        if content:
+            parts.append(f"--- REMINDERS.md ---\n{content}")
+
+    # ── 5. Tiered memory — long → mid → short ─────────────────────
     #    Short is last so it sits closest to the conversation turn.
     if include_long:
         # Fall back to legacy MEMORY.md during/after migration
@@ -81,7 +89,7 @@ def load_context(
             if "Not yet populated" not in content:
                 parts.append(f"--- MEMORY_SHORT.md ---\n{content}")
 
-    # ── 5. Raw session logs (tier 3+) ──────────────────────────────
+    # ── 6. Raw session logs (tier 3+) ──────────────────────────────
     if tier >= 3:
         sessions_dir = inara_dir / "sessions"
         if sessions_dir.exists():