fix: wrap container service errors with meaningful messages

[poyrazK]

Summary

Wrap container service errors with proper errors.Error type to ensure meaningful error messages are returned instead of generic "An unexpected error occurred".

Problem

When container deploy (or other container operations) fail, the API returns a raw database error that httputil.Error() doesn't recognize. It defaults to INTERNAL error with "An unexpected error occurred".

Solution

Wrap repository errors with errors.Wrap(errors.Internal, "meaningful context", err) in the service layer, following the pattern from other services like route_table.go.

Changes

internal/core/services/container.go:

• CreateDeployment: wrap repo.CreateDeployment error
• GetDeployment: wrap repo.GetDeploymentByID error
• ScaleDeployment: wrap repo.GetDeploymentByID and repo.UpdateDeployment errors
• DeleteDeployment: wrap repo.GetDeploymentByID and repo.UpdateDeployment errors

Verification

• go build ./... passes
• CI passes

Fixes #455

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ℹ️ Review info

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro

Run ID: a891f0b5-b1e7-4ea6-b5a1-14bab81a1a6b

📥 Commits

Reviewing files that changed from the base of the PR and between f6ac71f and 42661b6.

📒 Files selected for processing (1)

• internal/core/services/container.go

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch fix/container-error-wrapping

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