perf: optimize Docker images - backend 294MB, gateway 1.89GB

Backend:
- node:22-alpine runtime (from 1.82GB to 294MB, 84% reduction)
- COPY --chown instead of chown -R layer
- pnpm install --prod after build for clean .pnpm store
- Pinned pnpm@10 to avoid v11 build-script lockout

Gateway:
- Fixed TypeScript errors (missing table defs in shared schema)
- Restored node-crc Rust patch for native compilation
- Multi-stage build with COPY --chown
- pnpm install --prod after build
- ffmpeg with --no-install-recommends

Proxy:
- Restructured for standalone build (build errors are pre-existing)

General:
- pnpm@10 in all builds (avoids ERR_PNPM_IGNORED_BUILDS)
- Clean .dockerignore (excludes docs/design/scripts)

services/discord-gateway/src/shared/database/schema.ts

@@ -594,3 +594,103 @@ export type DbRetentionPolicyInsert =
 export type ChatbotMessage = typeof chatbotMessagesTable.$inferSelect;
 export type ChatbotMessageInsert =
   typeof chatbotMessagesTable.$inferInsert;
+
+// =============================================================================
+// Moderation Actions (gateway-local)
+// =============================================================================
+
+export const pgModerationActionsTable = pgTable(
+  "moderation_actions",
+  {
+    id: pgText("id").primaryKey(),
+    message_id: pgText("message_id"),
+    user_id: pgText("user_id"),
+    guild_id: pgText("guild_id").notNull(),
+    action_type: pgText("action_type", {
+      enum: [
+        "delete_message",
+        "mute_user",
+        "warn_user",
+        "kick_user",
+        "ban_user",
+      ],
+    }).notNull(),
+    reason: pgText("reason"),
+    executed_by: pgText("executed_by"),
+    status: pgText("status", {
+      enum: ["pending", "executed", "failed"],
+    })
+      .notNull()
+      .default("pending"),
+    error: pgText("error"),
+    created_at: pgBigint("created_at", { mode: "number" }).notNull(),
+    executed_at: pgBigint("executed_at", { mode: "number" }),
+  },
+  (table) => ({
+    messageIdIdx: pgIndex("idx_moderation_actions_message_id").on(
+      table.message_id,
+    ),
+    userIdIdx: pgIndex("idx_moderation_actions_user_id").on(table.user_id),
+    statusIdx: pgIndex("idx_moderation_actions_status").on(table.status),
+    guildStatusIdx: pgIndex("idx_moderation_actions_guild_status").on(
+      table.guild_id,
+      table.status,
+      table.created_at,
+    ),
+  }),
+);
+
+export const moderationActionsTable = pgModerationActionsTable;
+
+// =============================================================================
+// Message Edits (gateway-local)
+// =============================================================================
+
+export const pgMessageEditsTable = pgTable(
+  "message_edits",
+  {
+    id: pgUuid("id").defaultRandom().primaryKey(),
+    message_id: pgText("message_id").notNull(),
+    old_content: pgText("old_content").notNull(),
+    edited_at: pgBigint("edited_at", { mode: "number" }).notNull(),
+  },
+  (table) => ({
+    messageIdIdx: pgIndex("idx_message_edits_message_id").on(table.message_id),
+    editedAtIdx: pgIndex("idx_message_edits_edited_at").on(table.edited_at),
+  }),
+);
+
+export const messageEditsTable = pgMessageEditsTable;
+
+// =============================================================================
+// Reactions (gateway-local)
+// =============================================================================
+
+export const pgReactionsTable = pgTable(
+  "message_reactions",
+  {
+    id: pgText("id").primaryKey(),
+    message_id: pgText("message_id").notNull(),
+    channel_id: pgText("channel_id").notNull(),
+    guild_id: pgText("guild_id").notNull(),
+    user_id: pgText("user_id").notNull(),
+    username: pgText("username").notNull(),
+    emoji: pgText("emoji").notNull(),
+    emoji_id: pgText("emoji_id"),
+    animated: pgBoolean("animated").notNull().default(false),
+    reaction_type: pgText("reaction_type", {
+      enum: ["add", "remove"],
+    }).notNull(),
+    created_at: pgBigint("created_at", { mode: "number" }).notNull(),
+  },
+  (table) => ({
+    messageIdIdx: pgIndex("idx_reactions_message_id").on(table.message_id),
+    userIdIdx: pgIndex("idx_reactions_user_id").on(table.user_id),
+    guildCreatedIdx: pgIndex("idx_reactions_guild_created").on(
+      table.guild_id,
+      table.created_at,
+    ),
+  }),
+);
+
+export const reactionsTable = pgReactionsTable;