Add UnderlyingDB() method for extension database access

Implements database platform layer for extensions like VC to create
their own tables in the same SQLite database.

Changes:
- Add UnderlyingDB() *sql.DB to Storage interface
- Implement in SQLiteStorage to expose underlying connection
- Add comprehensive test suite (5 tests, -race clean)
- Tests cover: basic access, extension tables, concurrency,
  lifecycle safety, and transaction behavior

This allows VC to host its executor_instances and other tables
alongside beads core tables with proper FK enforcement.

Related issues: bd-57, bd-64, bd-65, bd-66

Amp-Thread-ID: https://ampcode.com/threads/T-a6715beb-fe92-4dee-b931-3c9327124875
Co-authored-by: Amp <amp@ampcode.com>
This commit is contained in:
Steve Yegge
2025-10-22 17:19:57 -07:00
parent a689c66f77
commit 6829372c39
6 changed files with 312 additions and 12 deletions

9
go.sum
View File

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