[misc] chore: increment version

[JoyboyBrian]

What

Why

Type of Change

• Bug fix (non-breaking change that fixes an issue)
• New feature (non-breaking change that adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)
• Refactor (code change that neither fixes a bug nor adds a feature)
• Documentation update
• CI/build configuration change

How to Test

Checklist

• PR title follows [module] type: description format
• Appropriate labels added (e.g. enhancement, bug, breaking)
• ruff check . and ruff format --check . pass
• pyright osmosis_ai/ passes
• pytest passes (new tests added if applicable)
• Public API changes are documented
• No secrets or credentials included

---

Summary by cubic

Bump package version to 0.2.16 to prepare the next release. Updates PACKAGE_VERSION in osmosis_ai/consts.py only; no functional changes.

^{Written for commit dbdf6f3. Summary will update on new commits.}

[cubic-dev-ai]

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