catalog: remove Sesame CSM stack — open csm-1b verified not deploy-worthy

Tear down the parked CSM stack (status: down, never successfully built).
Bring-up attempts failed at the image build: upstream
phildougherty/sesame_csm_openai pins no huggingface_hub version, which now
resolves to 1.17.0 where the `huggingface-cli` the Dockerfile relies on has
been removed (replaced by `hf`). Building would require vendoring + patching
the upstream Dockerfile.

Deep-research verdict (primary + community sourced) confirmed it isn't worth
that: the acclaimed Maya/Miles demo runs a fine-tuned, larger CSM variant
Sesame never open-sourced; the open csm-1b is the un-fine-tuned 1B base
(only the smallest of 1B/3B/8B shipped, no newer checkpoint as of mid-2026).
Ships no usable voices, can't generate text, English-only, can't stream
real-time out of the box; absent from current TTS leaderboards and dominated
by Kokoro/Dia2/Fish-S2/IndexTTS for narration.

Removes: stacks/csm/, playbooks/deploy-csm.yaml, the csm catalog service +
reproducibility_audit entries. Host state (compose dir, /worktank/csm) torn
down on irv-ml1; no container/image existed.

docs/asset-engine/services.yaml

@@ -1566,97 +1566,6 @@ services:
       the single-model-per-endpoint rationale + both-start-together caveat).
       Image local/dia:v2. Verified end-to-end 2026-05-31.
 
-  - id: csm
-    name: Sesame CSM (conversational)
-    description: >
-      Sesame's Conversational Speech Model (CSM-1B) — context-aware speech
-      (Llama backbone + Mimi codec). Usable as plain TTS, but its edge is
-      cross-turn prosody for voice agents, not narration.
-    category: tts
-    version: 1
-    status: down
-    host: irv-ml1
-    lifecycle:
-      stack: csm
-      vram_gb: 8
-      gpu_device_id: 0
-    endpoint: http://10.100.79.3:8201/v1/audio/speech
-    method: POST
-    content_type: application/json
-    model:
-      id: sesame/csm-1b
-      revision: null
-      image: local/csm:v1
-    fields:
-      - name: model
-        type: select
-        options: [csm-1b]
-        default: csm-1b
-      - name: input
-        type: textarea
-        label: Text
-        required: true
-        max_length: 5000
-        default: "Hello from Sesame."  # canonical: sesame/csm-1b model card
-      - name: voice
-        type: select
-        label: Voice
-        default: alloy
-        description: >
-          alloy | echo | fable | onyx | nova | shimmer, or a cloned voice ID.
-      - name: response_format
-        type: select
-        options: [mp3, opus, aac, flac, wav]
-        default: mp3
-      - name: speed
-        type: slider
-        min: 0.5
-        max: 2.0
-        step: 0.05
-        default: 1.0
-      - name: temperature
-        type: slider
-        min: 0.0
-        max: 1.0
-        step: 0.05
-        default: 0.8
-        description: Sampling temperature — higher = more variation.
-      - name: topk
-        type: number
-        required: false
-        description: Top-k sampling cutoff (1–100); no canonical default — wrapper's internal default applies if omitted.
-      - name: max_audio_length_ms
-        type: number
-        required: false
-        default: 90000
-        description: Max generated audio length in milliseconds.
-    response:
-      type: audio
-      mime_from_field: response_format
-    reproducibility:
-      seedable: false
-      deterministic: false
-      notes: >
-        ⚠️ No seed param and temperature-sampled → output varies run-to-run.
-        Per this contract that is normally a fix-before-adding bug; catalogued
-        by operator direction. asset-engine "regenerate/fork" will NOT
-        reproduce a prior CSM take. Clean fix = upstream seed support.
-    estimated_latency:
-      cold_start_s: 12
-      warm_per_unit: "~realtime on the 3090"
-    license: "Sesame CSM license (gated, non-OSI); MIT (wrapper)"
-    license_warning: |
-      sesame/csm-1b is GATED under Sesame's own (non-OSI) license — accept
-      terms on HF and review before any commercial/redistribution use. Host
-      needs CSM_HF_TOKEN set before first start.
-    notes: |
-      Conversational speech model — context-aware prosody for voice agents,
-      not a narration reader. Fields read from the phildougherty wrapper
-      README/API (2026-05-31); confirm against live OpenAPI at deploy.
-      Deployed to irv-ml1 but PARKED; gated-model token required before
-      first start. Because it is non-deterministic, when started it belongs
-      at status: experimental (not ready). Pin CSM_SHA before build.
-
   - id: zonos
     name: Zonos-v0.1 TTS
     description: >
@@ -1881,11 +1790,6 @@ reproducibility_audit:
     model_deterministic: false
     image_tag_mutable: false
     notes: "Dia2 1B streaming; same determinism story as dia2-2b. local/dia:v2."
-  - service: csm
-    seedable: false
-    model_deterministic: false
-    image_tag_mutable: false
-    notes: "⚠️ No seed + temperature-sampled → non-reproducible. Catalogued experimental by operator direction; upstream seed support is the fix. Gated Sesame license."
   - service: zonos
     seedable: true
     model_deterministic: true