fix(dots-tts): v2 — curly-punctuation sanitize + sentence-chunking

Curly apostrophes (ratatoskr's LLM emits typographic punctuation) made dots
mispronounce contractions ("Donut's"->"donut ess"); fold curly->ASCII before
synth, keep normalize_text on. Add server-side sentence-chunking so long turns
stop truncating at dots' ~40s single-generate cap (verified full 160s Zev).
Dockerfile: pin dots.tts==0.2.1 + torch/torchaudio==2.8.0 (upstream constraints
now pin a phantom gradio==6.17.0; float torchaudio->2.11.0 crashes the load).

stacks/dots-tts/.env.example

@@ -1,7 +1,10 @@
 # dots-tts stack tunables. Copy to `.env` on irv-ml1 before deploying.
 
 # ── image ────────────────────────────────────────────────────────────
-DOTS_TAG=v1
+# v2 (2026-08-10): curly->ASCII sanitize (fixes "Donut's"->"donut ess" on
+# typographic apostrophes) + server-side sentence-chunking (long turns no longer
+# truncate at dots' ~40s single-generate cap).
+DOTS_TAG=v2
 
 # ── network ──────────────────────────────────────────────────────────
 DOTS_BIND=0.0.0.0
@@ -17,6 +20,7 @@ DOTS_MODEL=dots-studio/dots.tts-soar
 DOTS_DEFAULT_VOICE=donut
 DOTS_NUM_STEPS=10          # 10 = full quality @ RTF ~0.22; lower = faster/rougher
 DOTS_GUIDANCE_SCALE=1.2
+DOTS_CHUNK_MAX_CHARS=280   # max chars per generate() chunk (dots caps ~40s/~500 patches)
 
 # ── host mounts ──────────────────────────────────────────────────────
 # HF cache holding the downloaded soar snapshot (~5GB). Reuse the burn-in cache.