Security: WebSocket Data Integrity

[ghost]

Summary

This PR improves the security and stability of the real-time WebSocket feed by ensuring all broadcasted data is properly sanitized and type-casted.

Changes

1. Data Sanitization: Added string conversion and length limits for and before broadcasting them to WebSocket clients. This prevents potentially malformed or oversized data from being pushed to the frontend.
2. Type Enforcement: Enforced explicit type casting for numeric fields (, ) and IDs to ensure downstream consumers receive consistent data shapes.
3. Robustness: Reduces the risk of frontend crashes or exploitation via injected WebSocket payloads.

Closes #2295

[Scottcjn]

Closing as part of Tier 0 hard-ban cleanup — see #3074 / #3104 / #3169 for the documented incident chain. All MichaelSovereign PRs are closed unread per the Tier 0 contract. No review path; no future PRs from this account will be processed. (See feedback_michaelsovereign_tier0_2026-05-02.md.)