fix(bot): chat agent — ГРЛС excerpts in drug check, questions with alcohol answered, retry, clearer logs

Live run through the API (Andrey, real OpenRouter): onset questions now answered from the instruction
excerpt, «можно пиво?» reaches the agent although the check-in records alcohol, quit intent keeps the single
rule reaction, findings are mentioned only for intake/combination questions, one retry on a provider error,
provider error message logged.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

app/dialog/flows/veteran_daily.py

@@ -448,7 +448,9 @@ async def _idle_text(ctx: Ctx, event: Event) -> Step:
         await save_checkin(ctx, **fields)
     if text is None and facts.med_question and not facts.quit_intent:
         text = await answer_question(ctx, await current_prescription(ctx))
-    if text is None and not fields and looks_like_question(ctx.text):
+    # A question is answered even if it also mentioned alcohol/side effects (those are recorded above).
+    # Quit intent gets the rule reaction (delayed-onset explanation + doctor notified) — no second answer.
+    if text is None and not facts.quit_intent and looks_like_question(ctx.text):
         text = await knowledge_answer(ctx, explicit=False)  # general question → clinical guidelines (#64)
     if text is None:
         text = await ctx.gateway.phrase("support")