Release v0.3.8: bump package + plugin to 0.3.8

[ashwin-agami]

Summary

Cuts v0.3.8. Bumps the version-of-truth in all four files and rolls [Unreleased] → [0.3.8]. Merging this + creating the GitHub Release triggers the GHCR image + PyPI publishes.

What's in this release (already merged to main)

Added

• OAuth refresh tokens (OAuth refresh-token grant — durable claude.ai sessions (Spec: ACE-033) #88, ACE-033) — the token endpoint issues a refresh_token and supports the refresh_token grant (RFC 6749 §6), so claude.ai silently renews the short-lived access token instead of the full login every hour. Rotation + reuse-detection, hash-at-rest, revocable; access stays 1h; lifetimes env-configurable with defaults. The oauth_refresh_token table migrates in automatically on boot.
• Client-binding fix (OAuth refresh: enforce client binding only when both sides present a client_id (Spec: ACE-033) #89) — the refresh bind check is enforced only when both sides present a client_id, so a client that authorized without one can still refresh.

Checklist

• Version bumped in all 4 files to 0.3.8
• [Unreleased] rolled to [0.3.8] + compare link
• Full gate green (1315 passed)

After merge

Create the GitHub Release v0.3.8 → publishes ghcr.io/agamiai/agami-core:0.3.8 / :0.3 / :latest + PyPI. The self-hosted server then picks it up via ./deploy.sh — the refresh-token table migrates in on boot, so the hourly re-login just stops (no re-onboarding).

[Copilot]

Pull request overview

Cuts release v0.3.8 by updating the project’s version “source of truth” across packaging and Claude plugin metadata, and by rolling the changelog entry from Unreleased to the 0.3.8 release section (dated 2026-07-06).

Changes:

• Bump Claude plugin version in plugins/agami/.claude-plugin/plugin.json to 0.3.8.
• Bump Python package version in packages/agami-core/pyproject.toml to 0.3.8.
• Roll CHANGELOG.md heading to ## [0.3.8] — 2026-07-06 and add the v0.3.7...v0.3.8 compare link.
• Bump marketplace metadata/plugin versions in .claude-plugin/marketplace.json to 0.3.8.

Reviewed changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated no comments.

File	Description
plugins/agami/.claude-plugin/plugin.json	Updates the Claude plugin’s version to 0.3.8.
packages/agami-core/pyproject.toml	Updates the PyPI package version to 0.3.8.
CHANGELOG.md	Promotes the release notes to 0.3.8 and adds the compare link.
.claude-plugin/marketplace.json	Updates marketplace metadata + plugin version to 0.3.8.

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