fix(docker): copy patches directory for pnpm patchedDependencies

pnpm install --frozen-lockfile fails in Docker with ENOENT when
pnpm-lock.yaml references patched dependencies (jsdoc@3.6.11.patch)
but the patches/ directory is not copied into the container.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

infra/docker/Dockerfile.backend

@@ -10,6 +10,9 @@ COPY pnpm-workspace.yaml .
 COPY pnpm-lock.yaml .
 COPY package.json .
 
+# Copy patches (pnpm patchedDependencies)
+COPY patches ./patches
+
 # Copy service
 COPY services/backend ./services/backend
 

infra/docker/Dockerfile.discord-gateway

@@ -13,6 +13,9 @@ COPY package.json .
 # Copy vendor packages (workspace dependencies)
 COPY vendor/discord.js-selfbot-v13 ./vendor/discord.js-selfbot-v13
 
+# Copy patches (pnpm patchedDependencies)
+COPY patches ./patches
+
 # Copy service
 COPY services/discord-gateway ./services/discord-gateway
 

infra/docker/Dockerfile.frontend

@@ -13,6 +13,9 @@ COPY pnpm-workspace.yaml .
 COPY pnpm-lock.yaml .
 COPY package.json .
 
+# Copy patches (pnpm patchedDependencies)
+COPY patches ./patches
+
 # Copy service
 COPY services/frontend ./services/frontend