feat(door): P2 connections + SSRF-safe executor + native adapter + audit

Migration 035 adds door_connections (per-space controller integration:
secret_ref -> AES-256-GCM secrets vault, never a plaintext password;
pinned_host SSRF pin; native_heatsync|generic_http adapter;
allow_member_self_entry opt-in for phase 3) and door_access_log
(append-only, secrets redacted, service-client-only writes; immutable).
RLS additive/default-deny: connections CRUD = door.manage; log SELECT =
door.manage/operate.

Safety core is pure and heavily unit-tested (door-logic, suite 409):
validateDoorTarget (request host must equal the pinned host;
metadata/link-local always blocked; http(s) only), the
firmware-verified HeatSync encoders with fixed-width zero-padding
(slot 3 / perm 3 / tag 8 / 4-char password), generic template
substitution, and redactDoorSecrets. lib/door/executor.ts is the single
hardened egress: re-validates the pin, refuses redirects, caps time and
body, redacts before any audit write. The door password is read from the
secrets vault and decrypted server-side only, never returned or logged.
/door/manage (door.manage) configures connections, picks a vault secret,
and runs a safe status-only test. Sidebar Admin link added; "Learn"
moved before "People" per request. Docs updated.

docs/DATABASE_SCHEMA.md

@@ -686,7 +686,7 @@ CREATE INDEX idx_activity_space ON activity_log(space_id, created_at);
 
 ---
 
-## Migrations 014-034 (additions since the 13-table baseline)
+## Migrations 014-035 (additions since the 13-table baseline)
 
 `scripts/schema.sql` is the canonical idempotent schema; each numbered
 migration is mirrored as a section in it. Tables/columns added:
@@ -714,6 +714,7 @@ migration is mirrored as a section in it. Tables/columns added:
 | 032 | `classes`, `class_sessions`, `class_signups` (class offerings, scheduled sessions, member signups; optional `payment_link` and `grants_certification_id`; partial unique = one non-cancelled signup per member+session). RLS additive + default-deny: classes SELECT = `classes.manage` (all) or member (`is_active`), class_sessions SELECT = any space member, class_signups SELECT = manage/instruct (all) or member (own), UPDATE = `classes.instruct`, NO INSERT/DELETE policy (signup/cancel via a validated service-client action enforcing capacity/waitlist/dedupe). New `classes.manage` + `classes.instruct` permissions seeded to board + backfilled. Cert-on-completion uses the normal certifications path (still needs `certifications.grant`). No anonymous path |
 | 033 | `equipment` (registry; status available/maintenance/retired; optional `required_certification_id`; `is_active` archive) + `equipment_reservations` (member time-window reservation; denormalized space_id; no DB overlap constraint). RLS additive + default-deny: equipment SELECT = `equipment.manage` (all) or member (`is_active`), reservations SELECT = `equipment.manage` (all) or member (own), UPDATE = `equipment.manage`, NO INSERT/DELETE policy (reserve/cancel via validated service-client action enforcing status + no-overlap + required-cert, manager override). New `equipment.manage` permission seeded to board + backfilled. No anonymous path |
 | 034 | `member_cards` (RFID/NFC card UID -> member; the UID is a credential -- `door.manage`-only RLS, no member SELECT policy; masked self-view via a server action). New `door.manage` + `door.operate` permissions (group Access; the whole Door epic uses them) seeded to board + backfilled. No controller calls in this phase, no anonymous path |
+| 035 | `door_connections` (per-space controller integration; shared password NOT stored -- `secret_ref` -> AES-256-GCM `secrets` vault, decrypted server-side only; `pinned_host` SSRF pin; adapter native_heatsync|generic_http; `allow_member_self_entry` opt-in) + `door_access_log` (append-only, secrets redacted). RLS additive + default-deny: door_connections CRUD = `door.manage`; door_access_log SELECT = `door.manage`/`door.operate`, NO write policy (service-client executor only; immutable). No new permission codes (door.* from 034). No anonymous path |
 
 New enum: `comment_entity_type` = `forum_thread | proposal | incident | policy`.