fix: raise default recursion limit from 30 to 1000

[avoidwork]

Description

Raises the agent's default LangGraph recursion limit from 30 to 1000 to prevent premature stalling during complex multi-step tasks. Fixes #229.

Type of Change

• Bugfix (non-breaking change which fixes an issue)

Files Changed

• src/config/schemas.js — Updated AgentSchema.recursionLimit default from 30 to 1000, and DEFAULT_CONFIG.agent.recursionLimit from 30 to 1000
• config.yaml — Updated agent.recursionLimit from 30 to 1000
• README.md — Updated environment variable and config reference tables
• tests/unit/config.test.js — Added 2 tests for agent.recursionLimit default (1000) and custom value acceptance
• openspec/changes/archive/2026-06-14-increase-recursion-limit/ — OpenSpec change archived

Testing

• Config schema validation tests pass (1120/1121 — 1 pre-existing flaky cron_sync test, unrelated)
• Lint passes with 0 warnings, 0 errors
• New tests verify default is 1000 and custom values are accepted

Coverage

• 100% line coverage maintained

Checklist

• npm run lint passes
• Tests pass
• No forbidden patterns used
• Conventional Commit style applied

Related

Fixes #229