Release v0.39.0-rc1

This release brings compatibility for Dify 1.17.0 and opts in E2B as optional agent sandbox.

What's Changed

Make the Helm chart compatible with Dify 1.17.0 (#447, #448, #449) @BorisPolonsky
Add local-sandbox persistence for agent homes, workspaces, and snapshots (#450) @BorisPolonsky
Run local sandbox as uid 1000 by default (#451) @BorisPolonsky (#451)
Add external E2B sandbox runtime for Agent Backend (#452) @BorisPolonsky
fix(ci): use utf8mb4 on external MySQL so skills.icon emoji default can migrate (#455) @BorisPolonsky
Bump chart version to 0.39.0-rc1 and app version to 1.17.0 (#454) @BorisPolonsky

For users who copied or overlaid values.yaml from a previous versions, make sure to update the following keys:

global.edition: default is now COMMUNITY as SELF_HOSTED is no longer valid.
External Secret Operator only): rename externalSecret.agentBackend.remoteRefs.DIFY_AGENT_SHELLCTL_AUTH_TOKEN to DIFY_AGENT_LOCAL_SANDBOX_AUTH_TOKEN.

Full Changelog: dify-0.38.0...dify-0.39.0-rc1