Wire schema v1 into a manual Supabase migration and vendor the real stack

- Move db/schema.sql to supabase/migrations/ as the first supabase CLI
  migration (manual `db push` only, no automated runner); re-add the
  gebos_ingest role + grants there since init.sql never re-runs
- Add gebos-postgres-passwords oneshot on db-host: syncs role passwords
  from sops (LoadCredential, journal-safe), makes supabase_admin
  SUPERUSER and hands the auth schema to supabase_auth_admin to match
  the upstream supabase/postgres image; add pg_hba rule for 10.0.0.0/8
- Vendor the official docker-compose (studio/kong/auth/rest/meta only,
  external Postgres, loopback Studio with no Kong dashboard route) plus
  kong.yml (trimmed) and kong-entrypoint.sh (verbatim); tested: compose
  config, Kong config parse, migration applied on TimescaleDB pg17
- Document decisions as ADRs 0001-0004 (migrations, passwords, vendored
  stack, JWT API keys incl. verify/mint procedure)

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

nix/supabase/init.sql

@@ -47,35 +47,4 @@ exception when duplicate_object then null; end $$;
 do $$ begin
   create role supabase_auth_admin login createrole;
   grant usage on schema auth to supabase_auth_admin;
-exception when duplicate_object then null; end $$;
-
--- Ingester writes telemetry; bypasses RLS because at write time no user is
--- authenticated. Trust boundary is the broker ACL ("who can publish to what
--- tenant's topic"), not the database.
-do $$ begin
-  create role gebos_ingest login bypassrls;
-exception when duplicate_object then null; end $$;
-
--- Telemetry hypertable. Tenant lives on the row so standard RLS works.
-create table if not exists public.telemetry (
-  ts          timestamptz not null,
-  tenant_id   uuid        not null,
-  device_id   uuid        not null,
-  metric      text        not null,
-  value       double precision,
-  payload     jsonb
-);
-
-select create_hypertable('public.telemetry', 'ts', if_not_exists => true);
-
-create index if not exists telemetry_tenant_device_ts_idx
-  on public.telemetry (tenant_id, device_id, ts desc);
-
-alter table public.telemetry enable row level security;
-
-create policy telemetry_tenant_isolation on public.telemetry
-  for select
-  using (tenant_id = current_setting('app.tenant_id', true)::uuid);
-
-grant select on public.telemetry to authenticated;
-grant insert on public.telemetry to gebos_ingest;
+exception when duplicate_object then null; end $$;