feat: Python parity for wol / banter / conversation / ddg_answer + 11 tests

New `wave59_handlers.py` (~250 lines) mirroring four Rust-only packs:

- wol: pure-Python magic packet via socket + SO_BROADCAST. No PowerShell
  shellout (unlike the Rust pack). Reads MAC from memory_store under
  'wol_<alias>' or JARVIS_WOL_TARGET env. Same MAC format tolerance
  (colons / dashes / dots / bare) as the Rust normaliser.

- banter: pause/resume state + fire-one. Python edition doesn't run a
  background banter thread (the Rust daemon already does), so this is
  just the user-facing surface — same voice phrases work.

- conversation: do_conversation_summary calls Groq with last 12 turns
  from main.py's `message_log`. set_history_ref() injects the live list
  reference at startup so the handler reads up-to-date history without
  a circular import. Offline-safe: GROQ_TOKEN missing → speak the last
  user message instead. do_conversation_repeat re-speaks the last
  assistant turn.

- ddg_answer: urllib + DuckDuckGo Instant Answer JSON. Picks
  AbstractText → Answer → Definition → RelatedTopics[0]. Opens
  duckduckgo.com search fallback when nothing instant.

extensions.py / main.py / commands.yaml: 7 new dispatch entries +
proxy fns. commands.yaml now at 207 entries.

tests/test_wave59_handlers.py: 11 unit tests for MAC normalisation,
magic packet shape, WOL error paths, banter state machine, DDG trigger
stripping, conversation history handling. Network calls deliberately
NOT exercised here — they belong to integration tests.

Tests: 104 → 115 (+11).

extensions.py

@@ -33,6 +33,7 @@ import time_tracker_handlers
 import outlook_handlers
 import wave68_handlers
 import expenses_handlers
+import wave59_handlers
 
 _speak_fn = print
 _set_clipboard_fn = None
@@ -51,6 +52,7 @@ def set_speak(fn):
     outlook_handlers.set_speak(fn)
     wave68_handlers.set_speak(fn)
     expenses_handlers.set_speak(fn)
+    wave59_handlers.set_speak(fn)
 
 
 def set_clipboard_fn(fn):
@@ -1176,3 +1178,14 @@ def do_expenses_log(a, v): expenses_handlers.do_expenses_log(a, v)
 def do_expenses_today(a, v): expenses_handlers.do_expenses_today(a, v)
 def do_expenses_week(a, v): expenses_handlers.do_expenses_week(a, v)
 def do_expenses_breakdown(a, v): expenses_handlers.do_expenses_breakdown(a, v)
+
+
+# ── Wave 5-9 proxies (wol / banter / conversation / ddg_answer) ────────────
+
+def do_wol(a, v): wave59_handlers.do_wol(a, v)
+def do_banter_fire(a, v): wave59_handlers.do_banter_fire(a, v)
+def do_banter_pause(a, v): wave59_handlers.do_banter_pause(a, v)
+def do_banter_resume(a, v): wave59_handlers.do_banter_resume(a, v)
+def do_conversation_summary(a, v): wave59_handlers.do_conversation_summary(a, v)
+def do_conversation_repeat(a, v): wave59_handlers.do_conversation_repeat(a, v)
+def do_ddg_answer(a, v): wave59_handlers.do_ddg_answer(a, v)