Fix Docker runtime errors: migrate to google-genai SDK and fix SQLite permissions

Migrate from deprecated google-generativeai to google-genai (>=1.0) using the
new Client-based API, and fix SQLite "unable to open database file" in Docker
by chowning the data directory to appuser before switching users.

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

Dockerfile

@@ -35,6 +35,7 @@ RUN mkdir -p data
 
 # Non-root user
 RUN useradd --create-home appuser
+RUN chown appuser:appuser data
 USER appuser
 
 HEALTHCHECK --interval=30s --timeout=5s --retries=3 \

pyproject.toml

@@ -7,7 +7,7 @@ dependencies = [
     "aiohttp>=3.9,<4",
     "pydantic>=2.5,<3",
     "pydantic-settings>=2.1,<3",
-    "google-generativeai>=0.8,<1",
+    "google-genai>=1.0,<2",
 ]
 
 [project.optional-dependencies]

src/brain/gemini_client.py

@@ -12,7 +12,7 @@ import re
 from dataclasses import dataclass
 from typing import Any
 
-import google.generativeai as genai
+from google import genai
 
 from src.config import Settings
 
@@ -36,8 +36,8 @@ class GeminiClient:
     def __init__(self, settings: Settings) -> None:
         self._settings = settings
         self._confidence_threshold = settings.CONFIDENCE_THRESHOLD
-        genai.configure(api_key=settings.GEMINI_API_KEY)
-        self._model = genai.GenerativeModel(settings.GEMINI_MODEL)
+        self._client = genai.Client(api_key=settings.GEMINI_API_KEY)
+        self._model_name = settings.GEMINI_MODEL
 
     # ------------------------------------------------------------------
     # Prompt Construction
@@ -133,7 +133,9 @@ class GeminiClient:
         logger.info("Requesting trade decision from Gemini")
 
         try:
-            response = await self._model.generate_content_async(prompt)
+            response = await self._client.aio.models.generate_content(
+                model=self._model_name, contents=prompt,
+            )
             raw = response.text
         except Exception as exc:
             logger.error("Gemini API error: %s", exc)

src/db.py

@@ -4,11 +4,14 @@ from __future__ import annotations
 
 import sqlite3
 from datetime import datetime, timezone
+from pathlib import Path
 from typing import Any
 
 
 def init_db(db_path: str) -> sqlite3.Connection:
     """Initialize the trade logs database and return a connection."""
+    if db_path != ":memory:":
+        Path(db_path).parent.mkdir(parents=True, exist_ok=True)
     conn = sqlite3.connect(db_path)
     conn.execute(
         """

src/evolution/optimizer.py

@@ -18,7 +18,7 @@ from datetime import datetime, timezone
 from pathlib import Path
 from typing import Any
 
-import google.generativeai as genai
+from google import genai
 
 from src.config import Settings
 
@@ -51,8 +51,8 @@ class EvolutionOptimizer:
     def __init__(self, settings: Settings) -> None:
         self._settings = settings
         self._db_path = settings.DB_PATH
-        genai.configure(api_key=settings.GEMINI_API_KEY)
-        self._model = genai.GenerativeModel(settings.GEMINI_MODEL)
+        self._client = genai.Client(api_key=settings.GEMINI_API_KEY)
+        self._model_name = settings.GEMINI_MODEL
 
     # ------------------------------------------------------------------
     # Analysis
@@ -122,7 +122,9 @@ class EvolutionOptimizer:
         )
 
         try:
-            response = await self._model.generate_content_async(prompt)
+            response = await self._client.aio.models.generate_content(
+                model=self._model_name, contents=prompt,
+            )
             body = response.text.strip()
         except Exception as exc:
             logger.error("Failed to generate strategy: %s", exc)