debug: probe fastify-static 9.1.1 test failures (do not merge)

[aitchiss]

Purpose

Throwaway branch off #8165 to investigate why integration tests fail with @fastify/static 9.0.0 → 9.1.1. Do not merge.

What this adds

Three console.error probes that bubble through devServer.output into vitest's failure log:

• [EF-PROBE] <method> <url> matched=<functionNames> — at src/lib/edge-functions/proxy.ts after registry.matchURLPath. Tells us whether requests reached the EF proxy and what the registry returned.
• [STATIC-PROBE] starting; root=<path> — at src/utils/static-server.ts boot.
• [STATIC-PROBE] <method> <url> — on every static-server request.

How to read the output

[EF-PROBE] for /ordertest?	matched=	Diagnosis
missing	—	request bypassed EF proxy entirely
present	[]	EF registry hadn't finished loading (race exposed by faster 9.1.1 boot)
present	full chain	EF matched but origin response leaked through
present	partial chain	registry partially loaded

Looking at the ubuntu Integration shard 3/4 logs for tests/integration/commands/dev/edge-functions.test.ts > should run edge functions in correct order.

Cleanup

Delete this branch once we have an answer; revert / never merge.

[github-actions]

📊 Benchmark results

Comparing with 89ce39f

• Dependency count: 1,061 (no change)
• Package size: 357 MB ⬆️ 0.62% increase vs. 89ce39f
• Number of ts-expect-error directives: 355 (no change)

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✨ Finishing Touches

🧪 Generate unit tests (beta)

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[aitchiss]

Closing — original failures on #8165 were flaky CI, confirmed across three runs. No regression from @fastify/static 9.1.1. Throwaway branch.