Bump version to 1.0.6

[OVVO-Financial]

Motivation

• Bump the package release version to 1.0.6 so the next build produces ovvo_nns-1.0.6-* artifacts and avoids TestPyPI/PyPI upload filename conflicts.

Description

• Update version = "1.0.5" → version = "1.0.6" in pyproject.toml, update __version__ = "1.0.5" → __version__ = "1.0.6" in src/nns/__init__.py, and update the package-at-a-glance Current version entry in README.md, and commit the changes with message Bump version to 1.0.6.

Testing

• Ran python scripts/check_version_consistency.py (passed), ruff check . (passed), uv run ruff check . (failed to fetch ruff from PyPI due to network/tunnel error), uv run pytest (failed to fetch pytest from PyPI due to network/tunnel error), and python -m pytest (failed due to missing numpy in the environment).

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Codex Task