feat: add LDAP authentication support to Infisical Ansible Collection

[victorvhs017]

Summary

Adds LDAP authentication to the Infisical Ansible collection, aligned with the Infisical Python SDK LDAP auth and PR #55.

Changes

• Authenticator (_authenticator.py): Added ldap_auth method using identity_id, ldap_username, and ldap_password. Requires infisicalsdk >= 1.0.16.
• Login module (login.py): New ldap_auth choice and parameters ldap_username, ldap_password.
• Login lookup (login.py): LDAP support and example usage.
• Auth doc fragment (auth.py): LDAP options for modules and lookups, including env vars INFISICAL_LDAP_USERNAME and INFISICAL_LDAP_PASSWORD.
• README: LDAP auth section with parameters, env vars, and usage example.

Usage

- name: Login with LDAP
  infisical.vault.login:
    auth_method: ldap_auth
    identity_id: "{{ ldap_identity_id }}"
    ldap_username: "{{ ldap_username }}"
    ldap_password: "{{ ldap_password }}"
  register: infisical_login

[greptile-apps]

Greptile Summary

Adds LDAP authentication support to the Infisical Ansible Collection, aligning with the Python SDK's LDAP auth feature. The implementation follows the existing authentication patterns consistently across all plugin types.

Key Changes:

• Introduced ldap_auth as a new authentication method requiring identity_id, ldap_username, and ldap_password
• Added minimum SDK version check (>= 1.0.16) for LDAP auth compatibility
• Properly marked sensitive parameters (ldap_password) with no_log: true for security
• Added environment variable support: INFISICAL_LDAP_USERNAME and INFISICAL_LDAP_PASSWORD
• Updated documentation fragments, README, and examples comprehensively

Quality:

• Code follows established patterns from existing auth methods (universal_auth, oidc_auth, token_auth)
• Proper input validation and error handling maintained
• Documentation is complete and includes usage examples

Confidence Score: 5/5

• This PR is safe to merge with no security concerns
• The implementation is clean, follows existing patterns precisely, includes proper security measures (no_log for sensitive data), has comprehensive validation and version checking, and provides complete documentation. No breaking changes or security issues detected.
• No files require special attention

Important Files Changed

Filename	Overview
plugins/module_utils/_authenticator.py	Added LDAP auth method with proper validation and version checking, consistent with existing auth patterns
plugins/modules/login.py	Added ldap_username and ldap_password parameters with proper no_log marking for security
plugins/lookup/login.py	Added LDAP support and example usage to lookup plugin, consistent with module implementation
plugins/doc_fragments/auth.py	Added LDAP auth documentation fragments with environment variable support, properly integrated
README.md	Added comprehensive LDAP auth documentation with parameters, environment variables, and usage examples

_{Last reviewed commit: 26d4535}