BrainCore Foundation 0.82.59 - CONTEXTUAL_COMMUNICATIONS_CORE_V1

- Adds Contextual Communications Core V1.
- Adds communications tables and recipient table.
- Adds frontend shortcode [braincore_contextual_communications_v1].
- Adds alias shortcode [bcf_communications].
- Supports create, receive, respond, confirm, and resolve.
- Uses actors from Directory as sender and recipient.
- Keeps scope minimal: no attachments, no signatures, no timeline, no advanced permissions.
