fix: remove Supabase (migrated to VPS), add Gemini API, update PostgreSQL tables

- Remove Supabase node and together realtime edge (migrated 2026-04-06)
- Add Gemini API node with posimai-api → gemini edge
- Update PostgreSQL description to include all 15 tables including Together tables
- Update version date to 2026-04-10

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

atlas.json

@@ -2,7 +2,7 @@
   "meta": {
     "owner": "mai",
     "description": "Posimai 開発インフラ構成",
-    "updated": "2026-04-05",
+    "updated": "2026-04-10",
     "version": "3"
   },
   "nodes": [
@@ -93,10 +93,17 @@
       "id": "postgresql",
       "label": "PostgreSQL 16",
       "type": "service",
-      "description": "VPS 本番 DB。articles / journal_posts / users / site_config / reading_history テーブル。users テーブルに plan（free/premium）・stripe_customer_id・stripe_subscription_id も管理。",
+      "description": "VPS 本番 DB。articles / journal_posts / users / auth_sessions / site_config / reading_history / habit_habits / habit_log / pulse_log / lens_history / together_groups / together_members / together_shares / together_reactions / together_comments テーブル。users に plan（free/premium）・Stripe ID 管理。Supabase からの Together 完全移行済み（2026-04-06）。",
       "status": "active",
       "parent": "vps-xserver"
     },
+    {
+      "id": "gemini",
+      "label": "Gemini API",
+      "type": "cloud",
+      "description": "Google Gemini 2.5 Flash。VPS 経由のみ利用。Brain 記事の AI 要約生成・Journal タグ提案・Together 投稿要約に使用。モデル固定: gemini-2.5-flash。",
+      "status": "active"
+    },
     {
       "id": "github",
       "label": "GitHub",
@@ -122,13 +129,6 @@
       "status": "active",
       "parent": "vercel"
     },
-    {
-      "id": "supabase",
-      "label": "Supabase",
-      "type": "cloud",
-      "description": "posimai-together のリアルタイムデータ・グループ共有機能のみ使用。Auth は VPS 自前システムに移行済み。",
-      "status": "active"
-    },
     {
       "id": "resend",
       "label": "Resend",
@@ -201,7 +201,7 @@
     { "from": "stripe",           "to": "posimai-api",     "type": "calls",   "label": "Webhook (決済完了)" },
     { "from": "posimai-store",    "to": "stripe",          "type": "calls",   "label": "Payment Link" },
     { "from": "posimai-apps",     "to": "posimai-api",     "type": "calls",   "label": "REST API (JWT認証)" },
-    { "from": "posimai-apps",     "to": "supabase",        "type": "calls",   "label": "realtime (together)" },
+    { "from": "posimai-api",      "to": "gemini",          "type": "calls",   "label": "AI 要約" },
 
     { "from": "uptime-kuma",      "to": "vps-xserver",     "type": "monitors","label": "死活監視" },
     { "from": "uptime-kuma",      "to": "ubuntu-pc",       "type": "monitors","label": "死活監視" },