fix(enterprise): ldap get-config command hangs/times out

[joshrotenberg]

Problem

The enterprise ldap get-config command hangs and eventually times out.

Steps to Reproduce

redisctl enterprise ldap get-config

# Command hangs indefinitely or times out

Expected Behavior

Should return the LDAP configuration for the cluster (even if empty/not configured).

Likely Causes

1. Incorrect endpoint path
2. Handler trying to access non-existent endpoint
3. LDAP endpoints might require specific cluster configuration

Investigation Needed

• Verify the correct endpoint path: /v1/cluster/ldap or /v1/ldap
• Test with raw API: redisctl api enterprise get /v1/cluster/ldap
• Check if LDAP endpoints are only available when LDAP is configured

Acceptance Criteria

• Command returns LDAP config or appropriate "not configured" message
• Doesn't hang or timeout
• Add integration test for this command

Part of #315

[joshrotenberg]

This issue refers to a non-existent command. The command ldap get-config doesn't exist in the current CLI.

The correct command is enterprise ldap get which works correctly:

REDIS_ENTERPRISE_URL="https://localhost:9443" \
REDIS_ENTERPRISE_USER="admin@cluster.local" \
REDIS_ENTERPRISE_PASSWORD="Redis123!" \
REDIS_ENTERPRISE_INSECURE="true" \
cargo run --bin redisctl -- enterprise ldap get

Returns valid LDAP configuration from /v1/cluster/ldap endpoint.