chore: release and CI updates

[shuv1337]

Summary

• bump last-synced-tag to v1.1.28 so snapshot publishes 1.1.28
• harden CI e2e workflow and add a local e2e runner for backend + Vite orchestration
• stabilize e2e selectors and fixtures (prompt/terminal locators, app-ready detection)
• seed models cache and extend models fixture (GitLab provider) for e2e runs

Testing

• bun test (packages/opencode)
• bun run test:e2e:local (packages/app)
• bun turbo typecheck

Greptile Summary

This PR bumps the last-synced-tag from v1.1.27 to v1.1.28, ensuring the snapshot publishing system uses the correct version number.

Key observations:

• The PR description mentions extensive CI and e2e workflow changes, but the actual diff only shows the version tag update
• The described changes (e2e workflow hardening, stabilized selectors, seeded models cache) appear to have been merged in previous commits and are not part of this specific PR's changeset
• The single-line change is straightforward and correctly increments the version tag

Confidence Score: 5/5

• This PR is safe to merge with minimal risk - it's a single-line version bump
• The change is trivial (single line version increment), well-understood, and has no logical complexity or potential side effects. The version format is correct (v1.1.28) and follows semantic versioning.
• No files require special attention

Important Files Changed

Filename	Overview
.github/last-synced-tag	Version tag bumped from v1.1.27 to v1.1.28 for snapshot publishing

Sequence Diagram

sequenceDiagram
    participant Dev as Developer
    participant Git as Git Repository
    participant Tag as last-synced-tag
    participant CI as CI/CD Pipeline
    participant Snap as Snapshot Publisher

    Dev->>Git: Commit changes
    Dev->>Tag: Update version v1.1.27 → v1.1.28
    Dev->>Git: Push to integration branch
    Git->>CI: Trigger CI workflow
    CI->>Tag: Read version tag
    Tag-->>CI: v1.1.28
    CI->>Snap: Publish snapshot with version 1.1.28
    Snap-->>CI: Snapshot published successfully

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