fix: raise Ollama transport timeouts (undici 300s default killed long 35B generations)

[ryandmonk]

Closes the last infrastructure hole the rerun exposed: repeatable fetch failed on the same cells, dying at ~301s with zero attempts recorded — undici's default headersTimeout (300s) aborting long local generations. The retry pass reproduced it on the same cells (p09/p11 long-thinking runs), ruling out flakiness; successful long runs all finished under ~300s per request.

Fix: OllamaAdapter sends requests through a long-lived undici Agent with headers/body timeouts raised to one hour — a deliberate ceiling for local inference, not "no timeout" (a hung server still fails rather than blocking a matrix forever). undici added as a dependency (adapter path only; the zero-network core boundary is untouched — its test still passes). Injected test fetches ignore the option; a new test asserts it's passed.

On merge: I delete the 3 remaining transport reports and run the final retry, which should leave qwen's column with zero infrastructure pollution.

AC: 76 tests green.

🤖 Generated with Claude Code

[Copilot]

Pull request overview

This PR addresses repeatable ~301s fetch failed transport failures during long local Ollama generations by routing OllamaAdapter requests through an undici Agent configured with much longer headers/body timeouts (1 hour), and adds eval rerun matrices documenting the rerun setup.

Changes:

• Add a long-lived undici Agent dispatcher in OllamaAdapter with 1-hour headersTimeout/bodyTimeout.
• Add a unit test asserting the Ollama request carries the dispatcher option.
• Add undici as a dependency and add rerun matrix JSON configs for eval runs.

Reviewed changes

Copilot reviewed 6 out of 7 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
src/adapters/ollama.ts	Adds an undici Agent dispatcher with raised transport timeouts and passes it via fetch init.
src/adapters/adapters.test.ts	Adds a test to ensure Ollama requests include the dispatcher option.
package.json	Adds undici dependency needed for the dispatcher/timeout configuration.
package-lock.json	Locks undici dependency resolution and records its engine requirements.
eval/matrix.rerun.json	Adds a documented rerun eval matrix (local + hosted) for the 2026-07-03 rerun.
eval/matrix.rerun-local.json	Adds a local-only rerun matrix configuration.
eval/matrix.rerun-hosted.json	Adds a hosted-only rerun matrix configuration.

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