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/secrets/secrets.yaml

@@ -17,8 +17,8 @@
 # Supabase compose stack (consumed on app-host by gebos-supabase.service)
 supabase_postgres_password: ENC[AES256_GCM,data:OrjkfiumbB3uMD0tuDkgzaiLDgnt20wYOP9tBAyVwVUXQJxLiDypJoUb4wTY,iv:b4/Lep0Jzb6UtAhyOCpcetXgppul+V5O43zokMtpM2M=,tag:3fvi5xpverfSG+xc/4/HHg==,type:str]
 supabase_jwt_secret: ENC[AES256_GCM,data:csu0Rj/DM07DCtYFieIe6eEca+eUPR6KGfQBqa6cqRe7bX4=,iv:OKYFa7Y1bbEAKh1ueM7K8JDLldrTJL/r83AGTtMx/IU=,tag:y6OGVofm4cUFPc0BBmkY+A==,type:str]
-supabase_anon_key: ENC[AES256_GCM,data:ReE4g5pNUHqi9M9ejnR88XUjwgaibcgZRM5GCMl+Ds7pzKUY442nqEtc2xVO2vQ=,iv:+lp/a/JshLZfdkxm4uQrgOKxBFmIduLtu3aUAhWrKlE=,tag:ft9swD2SeFJ/jMyL07kmGQ==,type:str]
-supabase_service_role_key: ENC[AES256_GCM,data:QZQbvJ6rkyoHIpxIvjVDFwxeZ4oIb7Bt2h2vgtW8/sp6swSxtW/oAeVfLkdeduir+2BC5mFAhA==,iv:/F5F3MRC5Yebn68g45F1sj4d18+60JZupneHa3ipExs=,tag:fuzDuSj2npxKQxP2Pz+cjQ==,type:str]
+supabase_anon_key: ENC[AES256_GCM,data:piGlqQFvF2pVeL/IedL+/PS+5WO2k90zQooNTk9Q9RPUWtkyIYkZxe5kU8OqmharPO6RJbm6Ez5ly2Gk5NyzodQiEUW58wyCK+iXkduUThvtihQS1fh63ijuIPLwzZAdAjRDTY6vYrWWBnUpRELo5A0QCY4SF7KZUkZhCFN0KUHie2PHHzOPVb0koaacqc+K7A2L6Q/Ay0miLG7MXKNDkHsXdXDh9fhP6A==,iv:kq9wti3d1tugHj2p9BPKG42ZIRvvtvU6eGZhh9Ywq1w=,tag:qBMJbFJ1v95uUDWQ9kLb7g==,type:str]
+supabase_service_role_key: ENC[AES256_GCM,data:jGIHQVni8Cc7trwl89mQzN2p2g3ry3mNHxYtXHBcmSkpHp7AjsuypxS3W4yEdq96nNLCkbFeFdw+0X4vC8JIhHhl0NHbVb1eKOM/k9fL7q/nEWGqJGdMxoOytF/2L/NjQgzIFfK2L+YDZYUPaf6Ve0FKJ/awnRi8Csrof73PY5rtBrgrndbobYHEBlmzjv25l28kT3lwD4kaKW6ThnxUFmSAUFMwUd9maAdWm+47Vb1G4rTN,iv:N+XbGLnWqiDUfRl53KrFkY37kyyLCuU5sSU9aNHBYXI=,tag:qu9koOkum0m0F83/OgGC2g==,type:str]
 supabase_dashboard_password: ENC[AES256_GCM,data:6KHJCPJ66dW9n/uzb3mpGIYqGZABHeEew1H5kx3I8kqgABqXcnHi6w==,iv:87NBfRoNOwtEKgGC0CacY/0xyVE5DQJpuN0X+7j8dfQ=,tag:TcMmIS2GgUlBXlH0elC7Rg==,type:str]
 # Ingester (consumed on mqtt-ingest by gebos-ingester.service)
 ingester_postgres_password: ENC[AES256_GCM,data:6jy1G6zG4r0z3c9B6s7jPUtvn/Nr/J2HQN23ch6AGFigiVbefY3hCw==,iv:X/PWQjTW/++MVGsi+hcxbkOJZQMOUH0a4mRH5CbOw4A=,tag:TBKFIdbXZ2YzDLbjdnsyxg==,type:str]
@@ -71,6 +71,6 @@ sops:
             -----END AGE ENCRYPTED FILE-----
           recipient: age190gu75rf3ra89mhk27xe3tv87tad087altqhugjlhkerqwe2jfqsnu738d
     encrypted_regex: ^(supabase_|ingester_|postgres_admin_|emqx_|porkbun_)
-    lastmodified: "2026-07-02T13:11:42Z"
-    mac: ENC[AES256_GCM,data:eJRwD6eGsmca+Gv3TP7JLSoCXlH34boilkxxEqRkbz8vNsCpEANZufet4Oes8vpNubU8yx509nrGo3SoC+MihvRaw/hfWqYOlXhlB0j6RsQuuG3LRQFVLJ1m1Q4zw5PYEcB/JHc4ORSIDrMb6nlemBc1dsDItIqyxlOqFnesUec=,iv:EBmK7XZ9ZDQT68FiItivu3QglhX0LfvMgw6n6qUhXUM=,tag:IqvQ4CVOrnWpQ3cE/mC/2w==,type:str]
+    lastmodified: "2026-07-08T20:32:18Z"
+    mac: ENC[AES256_GCM,data:56m8mOIai7eRKBXwcvWa0SLH6pH2LkL0zrRQ3nbfqe2qqn2qiji5dh4fzVVHmAKnXyob9HaRgRGBTnoi0L357MX+rzefSb0RTDXItsHkYSURYDZnRegEtszPpE5tlff/AlxtLXjs43P6nErkE263gzoFD2EFBwVlH6aufcX3fRo=,iv:eeGYKLRJqDq/ODHeyb6Ucn/K/drFNEJzKZGuAMEGGAU=,tag:qNo4uY4PV7C4MsYThvol3w==,type:str]
     version: 3.13.1