chore: release v1.16.0

[jpr5]

Release v1.16.0 (minor)

Releases the user-visible changes already merged to main: #124 (config validation relaxation) and #127 (Atlas distiller "Premature close" runtime fix). Current 1.15.4 → 1.16.0. #128 was a CI-only vitest scoping change and is intentionally not in the changelog (does not ship).

CHANGELOG

1.16.0

Minor Changes

• Config validation accepts minimal RAG configs — indexing and per-source chunk now optional with defaults (Make indexing and per-source chunk optional so minimal RAG configs validate (#88) #124)
• Fixed Atlas distiller LLM client "Premature close" errors, by disabling keep-alive on the test/proxy client (atlas: disable keep-alive on the test/proxy LLM client to fix Premature close #127)

Version bumps

• package.json version: 1.15.4 → 1.16.0
• src/cli.ts .version(...): 1.15.4 → 1.16.0
• version-sync verified in agreement.

Publishing

Merging this PR triggers publish-release.yml to publish @copilotkit/pathfinder@1.16.0 to npm and create the tag/GitHub Release. Do not tag or release by hand.