feat: Wave 7 — 'where did I leave off' + Stark trivia

leftoff/recap.lua:
- Voice "на чём я остановился" / "where did I leave off" stitches a
  one-paragraph recap from four independent sources:
    1. last assistant LLM reply (jarvis.llm_last_reply)
    2. 3 most-recent memory facts (sorted by last_used_at)
    3. count + name of the next scheduled task
    4. active profile (implicit, in tone)
- Fully offline — no LLM call, just pulls from local state.

trivia/trivia.lua:
- 15 RU + 15 EN one-liners about the Stark universe (suits, arc reactor,
  in-universe trivia about J.A.R.V.I.S. itself). Doesn't overlap with
  the verbatim quote pool in personality/tony_quote.lua.

Pack count: 95 → 97. Tests: 140 still pass.

resources/commands/trivia/command.toml

@@ -0,0 +1,27 @@
+# Random MCU / Iron Man trivia — one of dozens of fixed lines per language.
+# Different from the existing `interesting_fact/` (which is general curiosity)
+# and `personality/tony_quote` (which is verbatim film quotes).
+# These are short factoids about the suit, the Stark universe, etc.
+
+[[commands]]
+id = "trivia.iron_man"
+type = "lua"
+script = "trivia.lua"
+sandbox = "minimal"
+timeout = 2000
+
+[commands.phrases]
+ru = [
+    "расскажи про железного человека",
+    "факт про железного человека",
+    "trivia про старка",
+    "интересное про старка",
+    "марвел факт",
+]
+en = [
+    "tell me about iron man",
+    "iron man trivia",
+    "stark trivia",
+    "marvel fact",
+    "tell me a marvel fact",
+]