chore: genericize deployment-specific defaults for public release
- core compose: parameterize TZ (default Etc/UTC), restic S3 region+endpoint
(vendor-neutral default: AWS S3 us-east-1, no custom endpoint), and the
xray-enclave allowlist (APEX_ENCLAVE_SUBNET, default 198.18.0.0/16).
Cloudflare + resticontainer kept as-is.
- the reference fleet pins its real values (Europe/Moscow, ru-central1, Yandex
Object Storage) in each node's apex.env, so deployed behavior is unchanged.
- drop PARITY.md (internal bash->python port audit; node-specific narrative).
- genericize node-name leftovers (icarus/daedalus, MSK) in tests + comments.
Tests: 26/26 pass. Verified: resticontainer resolves ru-central1/Yandex/Moscow on a node.