Endpoint to get all rules

[bracyw]

Description

Return all rules in the system without subscription data (for admin/public dashboard views where subscription status is irrelevant). Used when displaying system-wide rule analytics, debugging rule configurations, or public-facing dashboards that show available monitoring rules without personalization per client.

Acceptance Criteria

• Returns all rules in system
• No subscription information included
• Time: O(R) where R = total rules

Proposed Solution

GET /rules
Response: Vec<Rule>

Method get_all_rules() already exists in RuleManager, just add endpoint to rule_controller.rs. Test using Postman for basic functionality, tests already exist in rule_structs_test.rs.

Mocks

No response