Stop echoing credential-bearing database URLs

[logbie]

Summary

• stop interpolating an unsupported database connection URL into the runtime error
• retain generic supported-scheme guidance without copying user info, host, path, or query data
• add a unique-secret regression and an Unreleased security changelog note

Security impact

An unsupported URL such as oracle://user:password@host/db was copied verbatim into catchable runtime errors, console diagnostics, and default debug reports. Those diagnostics no longer disclose the supplied URL or embedded credentials.

Validation

• git diff --check passed
• changed Rust code passed tree-sitter syntax parsing and the available formatter check
• native Cargo was unavailable locally; repository CI is the source-of-truth validation and passed on the final head
• all GitHub CI, config lint, and review checks passed on the final head

Part of the Rust-source production-readiness work tracked in #610.

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Review details

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro

Run ID: 92ee8c28-410b-43fb-88f7-4690261517d4

📥 Commits

Reviewing files that changed from the base of the PR and between 017e698 and e495d3e.

📒 Files selected for processing (2)

• CHANGELOG.md
• src/interpreter/database.rs

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch agent/redact-unsupported-database-url

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[devin-ai-integration]

✅ Devin Review: No Issues Found

Devin Review analyzed this PR and found no bugs or issues to report.

[Copilot]

Pull request overview

Removes credential-bearing database URLs from the unsupported-scheme error path in the interpreter’s database connection helper, adds a regression test to prevent reintroducing the leak, and documents the security change in the Unreleased changelog.

Changes:

• Stop interpolating the full (potentially credential-bearing) database URL into the “unsupported scheme” runtime error.
• Add an async regression test asserting the unsupported-scheme error does not echo embedded secrets or the full URL.
• Add an Unreleased Security changelog entry describing the diagnostic redaction.

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 1 comment.

File	Description
src/interpreter/database.rs	Replaces unsupported-URL error formatting to avoid echoing the full URL; adds a regression test for secret/URL non-echoing.
CHANGELOG.md	Adds an Unreleased Security note documenting the diagnostic change.

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[Copilot]

Pull request overview

Copilot reviewed 2 out of 2 changed files in this pull request and generated no new comments.

[logbie]

Superseded by #632, which preserves this security fix in the consolidated Rust-source hardening PR. The combined head is mergeable and all required CI checks are green.