fix(workflows): surface resumable runs on session restore

[w3lld1]

Summary

• detect resumable durable workflow references when an existing Atomic session starts or is resumed
• show each workflow name, short ID, and exact /workflow resume <id> command
• ignore completed, cancelled, and explicitly non-resumable workflows, using the latest cached state for each workflow

Validation

• /tmp/bun-runtime/bun-linux-x64/bun test test/unit/resumable-workflow-notices.test.ts (2 passed)
• git diff --check

The full workspace typecheck and test suite were not run locally because this runner did not have the repository dependencies installed and had insufficient disk space for a full bun install.

Fixes #1722

[lavaman131]

Thank you for adding the restored-session resume notice. During follow-up review, I found one eligibility gap: failed workflows with absent resumable metadata were omitted, even though durable workflow semantics treat failed (and blocked) runs as resumable unless they are explicitly marked resumable: false. A follow-up based on this work centralizes the eligibility rule and adds regression coverage: #1748. It supersedes/corrects this PR without changing its core intent.

[w3lld1]

Thanks for the follow-up and for preserving the core intent in #1748. Closing this superseded PR to keep the review queue clear.