`#resolveAdvisorRuntimeDescriptors` hardcoded `ThinkingLevel.Medium` when
no thinking suffix was configured. For reasoning models with no
controllable effort surface (`devin-agent`: `reasoning: true`,
`thinking: undefined` — Cascade selects effort by routing to sibling
model ids, not a wire param), that default tripped
`requireSupportedEffort` on the first advisor prompt with an empty
`Supported efforts:` list, disabling the advisor session-wide.
Route the default through `resolveThinkingLevelForModel(model, level)`
which preserves explicit `off`, clamps a concrete effort into the
model's supported range, and returns `undefined` for reasoning models
without controllable efforts — falling back to `Inherit` so no effort is
sent while reasoning stays enabled. Matches the `auto`-path fix
(`clampAutoThinkingEffort`) and the Autonomous Memory clamp
(`clampThinkingLevelForModel`).
Fixes#4579
roboomp