fix: upgrade Poetry to 2.2.1 for poetry.lock compatibility

Resolve Docker build failure caused by poetry.lock incompatibility:

**Root Cause:**
- Local Poetry version: 2.2.1
- Dockerfile Poetry version: 1.8.0
- poetry.lock generated with 2.2.1 not compatible with 1.8.0
- Build failed: "Dependency walk failed at triton (==3.5.0)"

**Solution:**
- Upgrade Poetry to 2.2.1 in all Dockerfiles (api, chat, worker)
- Update CI/CD pipeline to match (POETRY_VERSION: 2.2.1)
- Successfully tested Docker build with new version

**Files Modified:**
- deploy/docker/Dockerfile.api
- deploy/docker/Dockerfile.chat
- deploy/docker/Dockerfile.worker
- .gitea/workflows/build.yml

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

.gitea/workflows/build.yml

@@ -10,7 +10,7 @@ on:
     branches: [ main ]
 
 env:
-  POETRY_VERSION: 1.8.0
+  POETRY_VERSION: 2.2.1
   PYTHON_VERSION: "3.12"
   REGISTRY: ${{ vars.PACKAGES_REGISTRY }}
   IMAGE_NAME: ${{ gitea.repository }}

deploy/docker/Dockerfile.api

@@ -4,7 +4,7 @@ FROM python:3.12-slim AS builder
 WORKDIR /build
 
 # Install Poetry and export plugin
-RUN pip install --no-cache-dir poetry==1.8.0 poetry-plugin-export
+RUN pip install --no-cache-dir poetry==2.2.1 poetry-plugin-export
 
 # Copy dependency files
 COPY pyproject.toml poetry.lock ./

deploy/docker/Dockerfile.chat

@@ -4,7 +4,7 @@ FROM python:3.12-slim AS builder
 WORKDIR /build
 
 # Install Poetry and export plugin
-RUN pip install --no-cache-dir poetry==1.8.0 poetry-plugin-export
+RUN pip install --no-cache-dir poetry==2.2.1 poetry-plugin-export
 
 # Copy dependency files
 COPY pyproject.toml poetry.lock ./

deploy/docker/Dockerfile.worker

@@ -4,7 +4,7 @@ FROM python:3.12-slim AS builder
 WORKDIR /build
 
 # Install Poetry and export plugin
-RUN pip install --no-cache-dir poetry==1.8.0 poetry-plugin-export
+RUN pip install --no-cache-dir poetry==2.2.1 poetry-plugin-export
 
 # Copy dependency files
 COPY pyproject.toml poetry.lock ./