Adds forms to organization, site, and equipment pages to configure SNMP
community strings with hierarchical fallback.
Changes:
- Organization settings: Add SNMP version and community fields
- Site form: Add SNMP config section with inheritance notice
- Equipment form: Update SNMP fields to show inheritance source and effective values
The UI now shows:
- Where the SNMP config is coming from (equipment, site, organization, or default)
- What the effective values are when inheriting
- Visual indicators for overrides vs inheritance
All forms use the Equipment.get_snmp_config/1 function for consistent
hierarchical resolution.
Graham McIntire
60b97136c7