feat: load version dynamically from pyproject.toml

- Add _get_version_from_pyproject() function to config.py
- APP_VERSION now uses default_factory to load from pyproject.toml
- Add pyproject.toml to Docker build for version detection
- Add LIBRARY_DESK configuration settings

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

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

Dockerfile

@@ -5,7 +5,7 @@ WORKDIR /app
 RUN apt-get update && apt-get install -y curl \
     && rm -rf /var/lib/apt/lists/*
 
-COPY requirements.txt .
+COPY requirements.txt pyproject.toml ./
 RUN pip install --no-cache-dir -r requirements.txt
 
 COPY src/ ./src/

src/core/config.py

@@ -4,11 +4,34 @@ Following best practice of splitting config across domains.
 """
 from enum import Enum
 from functools import lru_cache
+from pathlib import Path
 
 from pydantic import Field, HttpUrl
 from pydantic_settings import BaseSettings, SettingsConfigDict
 
 
+def _get_version_from_pyproject() -> str:
+    """
+    Load version from pyproject.toml.
+
+    Falls back to "unknown" if file cannot be read.
+    """
+    try:
+        # Find pyproject.toml relative to this file
+        config_dir = Path(__file__).parent
+        pyproject_path = config_dir.parent.parent / "pyproject.toml"
+
+        if pyproject_path.exists():
+            content = pyproject_path.read_text()
+            for line in content.splitlines():
+                if line.strip().startswith("version"):
+                    # Parse: version = "1.0.0"
+                    return line.split("=", 1)[1].strip().strip('"').strip("'")
+    except Exception:
+        pass
+    return "unknown"
+
+
 class Environment(str, Enum):
     """Application environment."""
     DEVELOPMENT = "development"
@@ -32,7 +55,7 @@ class Config(BaseSettings):
     
     # Application
     APP_NAME: str = "OpenAI-Compatible API"
-    APP_VERSION: str = "0.2.5"
+    APP_VERSION: str = Field(default_factory=_get_version_from_pyproject)
     ENVIRONMENT: Environment = Environment.DEVELOPMENT
     DEBUG: bool = Field(default=False, description="Debug mode")
     
@@ -87,6 +110,20 @@ class Config(BaseSettings):
         description="Redis connection timeout in seconds"
     )
 
+    # Library-Desk Configuration (The Librarian backend)
+    LIBRARY_DESK_HOST: HttpUrl = Field(
+        default="http://localhost:8089",
+        description="Library-Desk API URL"
+    )
+    LIBRARY_DESK_API_KEY: str = Field(
+        default="",
+        description="API key for Library-Desk authentication"
+    )
+    LIBRARY_DESK_TIMEOUT: int = Field(
+        default=60,
+        description="Library-Desk request timeout in seconds"
+    )
+
     # Logging
     LOG_LEVEL: str = Field(default="INFO", description="Logging level")
     ENABLE_BENCHMARKS: bool = Field(default=True, description="Enable performance benchmarking")