[KLO-109] fix: IAM missing account name, infra missing cluster grpc error, and vpndevice message publishing

[nxtcoder17]

Resolves kloudlite/kloudlite#25

[sourcery-ai]

This automated comment suggests enhancements to the PR title and body to improve clarity and facilitate a quicker review

Title suggestion

Fix account name validation in IAM and update event publishing in VPN device management

Reasons to update the title

• Consider breaking down the PR into smaller, focused changes if possible.
• The title tries to cover too much ground. It's better to focus on a single main change for clarity.
• Use a more descriptive and specific title that summarizes the main change or the most critical fix.

Body suggestion

This PR addresses two main issues: incorrect handling of missing account names in IAM service and an update to the event publishing mechanism in the VPN device management domain. The IAM service now correctly validates for non-empty account names, preventing potential errors in account-related operations. Additionally, the VPN device management's event publishing has been streamlined to use a more generic `PublishConsoleEvent` method, enhancing the consistency and maintainability of event handling across the system.

**Key Changes:**
- Added validation for non-empty account names in IAM's `Can` method.
- Replaced `PublishProjectResourceEvent` with `PublishConsoleEvent` in VPN device management to standardize event publishing.
- Fixed a logical error in `infra` service's `ClusterExists` method to correctly handle cluster not found scenarios.

These changes aim to improve the robustness and clarity of the system's account handling and event publishing mechanisms.

Reasons to update the body

• The description is missing. It's crucial to provide context and reasoning for the changes made.
• Include a brief explanation of the problem being solved or the reason for the change.
• Mention any related tickets, discussions, or documents that provide additional context.
• If the PR addresses multiple issues, briefly describe how and why each change contributes to the overall solution.
• Consider outlining the main changes in the code for a quick overview.

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[sourcery-ai]

PR Type: Refactoring

PR Summary: This pull request encompasses a series of changes aimed at refining the event publishing mechanism within the VPN device domain, enhancing error handling in the infrastructure's gRPC server, and introducing validation for the 'accountName' field in the IAM service. Specifically, it transitions from using a project-specific event publishing function to a more generalized console event publisher, addresses a logical error in cluster existence checking, and ensures that an 'accountName' is provided before proceeding with certain operations.

Decision: Comment

📝 Type: 'Refactoring' - not supported yet.

• Sourcery currently only approves 'Typo fix' PRs.

✅ Issue addressed: this change correctly addresses the issue or implements the desired feature.

No details provided.

✅ Small diff: the diff is small enough to approve with confidence.

No details provided.

General suggestions:

• Ensure that the transition to a generalized event publishing mechanism does not inadvertently remove necessary context or granularity required by downstream consumers of these events.
• Consider the broader impact of the changes on the system's functionality, especially in terms of event handling and error reporting, to ensure that the modifications enhance rather than detract from the system's robustness.
• Review the newly introduced validation for 'accountName' to ensure it covers all necessary cases and does not exclude any valid scenarios that were previously supported.

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[sourcery-ai]

suggestion (llm): Adding validation for accountName is a good practice to ensure data integrity. However, consider if there are any edge cases where an empty accountName might be valid or if additional validation on the format or content of accountName is needed.