Improve database loading/connection error logs

[jamescmartinez]

Summary

This PR improves db error messages. This is most obvious when setting up a new project and a DB connection string is invalid.

[Copilot]

Pull request overview

This PR improves database connection error messages to provide clearer, more actionable feedback when database connections fail, especially helpful during initial project setup.

Changes:

• Added a new wrapError utility function to wrap errors with clearer messages while preserving original error details
• Enhanced SQLite and Postgres backend connection methods to catch and wrap connection errors with helpful guidance
• Added comprehensive test coverage for the new error handling behavior

Reviewed changes

Copilot reviewed 6 out of 6 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
packages/openworkflow/core/error.ts	Added wrapError function to create wrapped errors with preserved causes
packages/openworkflow/core/error.test.ts	Added tests for wrapError function with Error and string inputs
packages/openworkflow/sqlite/backend.ts	Wrapped database connection errors with helpful messages about path validity
packages/openworkflow/sqlite/backend.test.ts	Added test to verify helpful error messages for invalid database paths
packages/openworkflow/postgres/backend.ts	Wrapped connection errors with helpful messages including URL format examples
packages/openworkflow/postgres/backend.test.ts	Added test to verify helpful error messages for invalid connection URLs

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.

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