Normalize IDs to lowercase before querying OpenSearch

[Copilot]

OpenSearch queries were case-sensitive for client_id, provider_id, and consortium_id parameters, causing queries with differently-cased IDs to return incorrect results.

Changes

• Applied strings.ToLower() to all ID parameters in BuildBaseQuery() before adding them as OpenSearch term filters

// Before
filters = append(filters, osquery.Term("client.id", clientId))

// After  
filters = append(filters, osquery.Term("client.id", strings.ToLower(clientId)))

This ensures case-insensitive ID matching: ?client_id=ABC123 and ?client_id=abc123 now produce identical queries.

Original prompt

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This section details on the original issue you should resolve

<issue_title>IDs should be normalized to lowercase before querying OpenSearch</issue_title>
<issue_description></issue_description>

Comments on the Issue (you are @copilot in this section)

• Fixes IDs should be normalized to lowercase before querying OpenSearch #16

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