fix(infra): drop fly idle_timeout 600 -> 120

[kevincodex1]

600s idle windows let hung clients pin Fly proxy connection slots up to hard_limit, which amplified the 2026-06-12 production outage. 120s was deployed there as the fix; carry it into the reference config.

Summary by CodeRabbit

• Chores
  • Updated server connection handling configuration to improve service reliability and stability.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro Plus

Run ID: ca9a26c9-e84e-4b81-844b-4baee637feda

📥 Commits

Reviewing files that changed from the base of the PR and between 6abaf1d and 311272a.

📒 Files selected for processing (1)

• infra/fly/fly.toml

---

📝 Walkthrough

Walkthrough

The Fly.io configuration for the gitlawb-node-test app reduces the HTTP service idle timeout from 600 seconds to 120 seconds. Inline comments are updated to explain the rationale: preventing hung clients from pinning connections during long idle windows, informed by a prior production outage.

Changes

Fly.io HTTP Idle Timeout Configuration

Layer / File(s)	Summary
HTTP idle timeout adjustment infra/fly/fly.toml	idle_timeout within http_service.http_options is reduced from 600 to 120 seconds with updated comments referencing prevention of hung clients pinning connections and hard_limit as a root factor in prior production context.

Estimated Code Review Effort

🎯 1 (Trivial) | ⏱️ ~3 minutes

Poem

A rabbit hops through config files so fine,
Where idle_timeout shrinks from six to one—
No hanging clients now will hog the line,
Two minutes tops before the timeout's done! 🐰⏱️

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title clearly and specifically describes the main change: reducing the Fly.io idle_timeout configuration value from 600 to 120 seconds.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

_{✏️ Tip: You can configure your own custom pre-merge checks in the settings.}

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch infra/fly-idle-timeout

---

_{Comment @coderabbitai help to get the list of available commands and usage tips.}