Add dev infrastructure improvements

- Central config with logging on startup
- Hot reload support for GPU worker (docker-compose.gpu-dev.yml)
- Quick deploy script (scripts/gpu-dev-deploy.sh)
- GPU/CPU frame compatibility tests
- CI/CD pipeline for GPU worker (.gitea/workflows/gpu-worker.yml)
- Standardize GPU_PERSIST default to 0 across all modules

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

app/config.py

@@ -2,9 +2,11 @@
 L1 Server Configuration.
 
 Environment-based configuration with sensible defaults.
+All config should go through this module - no direct os.environ calls elsewhere.
 """
 
 import os
+import sys
 from pathlib import Path
 from dataclasses import dataclass, field
 from typing import Optional
@@ -52,6 +54,16 @@ class Settings:
         default_factory=lambda: os.environ.get("L2_DOMAIN")
     )
 
+    # GPU/Streaming settings
+    streaming_gpu_persist: bool = field(
+        default_factory=lambda: os.environ.get("STREAMING_GPU_PERSIST", "0") == "1"
+    )
+    ipfs_gateways: str = field(
+        default_factory=lambda: os.environ.get(
+            "IPFS_GATEWAYS", "https://ipfs.io,https://cloudflare-ipfs.com,https://dweb.link"
+        )
+    )
+
     # Derived paths
     @property
     def plan_cache_dir(self) -> Path:
@@ -68,5 +80,26 @@ class Settings:
         self.analysis_cache_dir.mkdir(parents=True, exist_ok=True)
 
 
+    def log_config(self, logger=None) -> None:
+        """Log all configuration values for debugging."""
+        output = logger.info if logger else lambda x: print(x, file=sys.stderr)
+        output("=" * 60)
+        output("CONFIGURATION")
+        output("=" * 60)
+        output(f"  cache_dir:            {self.cache_dir}")
+        output(f"  redis_url:            {self.redis_url}")
+        output(f"  database_url:         {self.database_url[:50]}...")
+        output(f"  ipfs_api:             {self.ipfs_api}")
+        output(f"  ipfs_gateway_url:     {self.ipfs_gateway_url}")
+        output(f"  ipfs_gateways:        {self.ipfs_gateways[:50]}...")
+        output(f"  streaming_gpu_persist: {self.streaming_gpu_persist}")
+        output(f"  l2_server:            {self.l2_server}")
+        output("=" * 60)
+
+
 # Singleton settings instance
 settings = Settings()
+
+# Log config on import if DEBUG or SHOW_CONFIG is set
+if os.environ.get("DEBUG") or os.environ.get("SHOW_CONFIG"):
+    settings.log_config()