fix(event): remove directory filter from SSE stream for worktree sessions - #49963

Issue for this PR

Closes #49861 (re-report of #35917, which was auto-closed after 60 days of inactivity)

Type of change

• Bug fix

What does this PR do?

The SSE /event handler filters the stream with event.location?.directory === instance.directory. Worktree sessions live in a different directory than the main checkout, so every event from worktree activity fails that check and is dropped — subscribers receive nothing for worktree sessions (#35917 / #49861).

This removes the directory equality check and keeps the workspaceID check, so clients still only receive events for their own workspace (or workspace-global events where workspaceID is undefined).

Supersedes #35913 — same change, rebased onto current dev; that PR was closed by the automated cleanup bot for age, not on merit.

How did you verify your code works?

Ran the server from source (bun packages/opencode/src/index.ts serve) against a git repo with a worktree, on unpatched dev and on this branch:

1. Subscribed to /event?directory=<main-checkout>
2. Created a session via POST /session?directory=<worktree-dir> (response confirms "directory": "<worktree-dir>")
3. Compared what the subscriber received:

Screenshots / recordings

Server-side change; table above.

Checklist

• I have tested my changes locally
• I have not included unrelated changes in this PR