bench: add the Meli solo cloudflare/fp8 cell (take 3)

Same Meli-solo condition as tb-meli-solo-baseten.yaml with the pin moved
to cloudflare/fp8 (Tyler, thread 74a65a09, event 857619b8), after the
baseten/fp8 shared pool rate-limited the smoke gate (~22 upstream 429s
per trial). Priced at cloudflare's listed rates (prompt $0.14/M,
completion $0.28/M -- OpenRouter endpoints API, 2026-08-07; no cached
rate listed, cached priced as input).

Co-authored-by: Eva <011987e296fd5006292d2f930b574be47c7801048d1983c46c425d3c95f0cffd@buzz.block.builderlab.xyz>
Signed-off-by: Eva <011987e296fd5006292d2f930b574be47c7801048d1983c46c425d3c95f0cffd@buzz.block.builderlab.xyz>

benchmarks/harbor-buzz-orchestra/manifests/tb-meli-solo-cloudflare.yaml

@@ -0,0 +1,39 @@
+# Meli solo cell, take 2: same Tyler-picked persona (buzz-benchmarking thread
+# 74a65a09) on deepseek/deepseek-v4-flash-0731 via OpenRouter, now pinned to
+# the cloudflare/fp8 upstream (Tyler, event 857619b8) instead of gmicloud/fp8.
+#
+# Identical to tb-meli-solo.yaml except the pinned provider and its listed
+# rates. Runs on the post-merge harness (PR #5145 head), which carries the
+# #4896 vision-input recovery and the #5136 explicit-mention task post that
+# the first solo run predated. The pin itself lives in
+# testbed/endpoints/openrouter-live.json (OPENROUTER_PROVIDER_ORDER).
+schema_version: "1"
+condition: tb-meli-solo-cloudflare
+roster:
+  - id: meli
+    kind: orchestrator
+    role: solo
+    count: 1
+    endpoint: deepseek/deepseek-v4-flash-0731
+    model_revision: deepseek/deepseek-v4-flash-20260731
+    prompt:
+      path: personas/bench/meli-solo.md
+      sha256: de6330190fe22cb4b58cd5c2ca1cb7fc080e9b7f97b298c8960e08854e7a7a8b
+    generation:
+      thinking_effort: high
+prices:
+  deepseek/deepseek-v4-flash-0731:
+    # cloudflare/fp8 listed rates (OpenRouter endpoints API, 2026-08-07):
+    # prompt $0.14/M, completion $0.28/M.
+    input_per_million_usd: 0.14
+    cached_input_per_million_usd: 0.14
+    output_per_million_usd: 0.28
+    cache_read_rate: 0.0
+trial_budget:
+  # Identical to every other TB solo cell.
+  timeout_seconds: 36000
+
+environment:
+  # Identical in every condition -- see tb-solo-luna.yaml for the reasoning.
+  override_cpus: 4
+  override_memory_mb: 8192

benchmarks/harbor-buzz-orchestra/testbed/endpoints/openrouter-cloudflare.json

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+{
+  "deepseek/deepseek-v4-flash-0731": {
+    "provider": "openrouter",
+    "api_key_env": "OPENROUTER_API_KEY",
+    "env": {
+      "OPENROUTER_PROVIDER_ORDER": "cloudflare/fp8"
+    }
+  }
+}