Update documentation for 75-source catalog and mirror management
connectors.md: categorized index of all 75 sources across 14 categories
with descriptions, auth requirements, priorities, regions, and status.
FSTEC BDU, NKCKI, and Kaspersky ICS promoted from beta to stable.
architecture.md: updated source families (75 sources, 14 categories),
added mirror domain management API (12 endpoints) to REST APIs section.
mirrors.md: added MirrorExportScheduler docs, multi-value filter support
(sourceCategory/sourceTag shorthands), mirror config UI sections (wizard,
dashboard, catalog integration).
docker.md: added section 7 with mirror env var reference (11 vars),
domain config via env vars, filter shorthand documentation.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
254d8b9cfc