BUG - migrateFromGlobal skips sessions after directory case change on Windows

[NamedIdentity]

Describe the bug

The inline global session migration in fromDirectory (project.ts) uses eq(SessionTable.directory, data.worktree) — SQLite strict equality. On Windows where paths are case-insensitive, sessions stored under a directory with different casing are silently skipped during migration.
For example: sessions created in C:\ai-work\dtd\my-project (lowercase parent) are never migrated when the parent is later renamed to C:\ai-work\DTD\my-project (uppercase). The WHERE directory = 'C:\ai-work\DTD\my-project' never matches the stored lowercase path.
Related to #17183 (broader Windows path normalization).

Steps to reproduce

1. Open opencode in a non-git directory (e.g. C:\work\dtd\project) — sessions created under global
2. Rename parent directory casing (e.g. dtd → DTD)
3. Run git init + first commit in the project
4. Restart opencode — migration runs but skips the old sessions because dtd ≠ DTD
5. Old sessions remain orphaned under global

OpenCode version

1.2.24+

Operating System

Windows 10

Terminal

Windows Terminal