chore: Update version to 6.2.0 in configuration and installation scripts

[Rudasingwa-kevin]

Description

Type

• feat – New feature
• fix – Bug fix
• refactor – Code restructuring
• docs – Documentation
• test – Tests
• perf – Performance
• chore – Maintenance

Changes

Architecture Area

• Middleware chain (core/middleware.py)
• Analysis / Skills (analysis/analyzer.py, analysis/skills.py)
• Sub-agents (agents/registry.py)
• Tools (tools/protocol.py)
• Memory / Learning (orchestrator/memory.py)
• PR Patrol (pr/patrol.py)
• Pipeline (orchestrator/pipeline.py)
• Other:

Pre-submit Checklist

⚠️ CI will auto-run on your PR. Please verify locally before pushing.

• ruff check contribai/ passes (lint)
• ruff format --check contribai/ tests/ passes (format)
• pytest tests/ -v passes (356+ tests)
• Code follows project conventions (async, type hints, Google docstrings)
• from __future__ import annotations at top of new files
• No hardcoded secrets
• DCO signoff on all commits (git commit -s)

Related Issues

[tang-vu]

LGTM. Real fixes:

• json_parser.rs:342 — fixes E0308 compile error blocking cargo test
• Cargo.toml + install scripts — sync version with README badge (v6.2.0)
• patrol.rs:905 — silence unused-var warning

Thanks @Rudasingwa-kevin for catching the compile error.

[tang-vu]

Đã được merge (gián tiếp) qua #30 với credit Co-authored-by: @Rudasingwa-kevin.

Mình bundle các fixes của PR này cùng với fixes cho clippy 1.95 lints và 4 failing tests pre-existing trên main vào một commit duy nhất để giữ lịch sử git sạch.

Cảm ơn bạn đã catch compile error ở json_parser.rs:342 — đó là lỗi nghiêm trọng đang block CI cho mọi PR khác. 🙏

Squash commit: cfe4568