feat: complete Phase 1 - vocabulary expansion & DriftProbe infrastructure

- CLI: nyx-probe scan with --summary/--delta/--full flags
- DriftProbe: training safety with Gini coefficient + Angular Drift
- Vocabulary: 54 terms (30 nimmerverse + 24 German philosophical)
- Sentinels: ANCHOR/BRIDGE/CANARY/TARGET monitoring system

Key findings:
- German philosophical terms: 37.5% depth≥2 hit rate (vs 3.3% nimmerverse)
- Super Cluster validated: heart cross-lang sim = 1.000
- Isolated Zone confirmed: being EN↔DE sim = 0.195
- Gini signature: Philosophy ~0.5 (diffuse), Technical ~0.8 (sparse)

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

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

nyx_probing/config.py

@@ -0,0 +1,51 @@
+"""
+Configuration for nyx-probing framework.
+"""
+from pathlib import Path
+from pydantic import BaseModel
+from typing import Optional
+import os
+
+
+class ModelConfig(BaseModel):
+    """Model configuration."""
+    name: str = "Qwen/Qwen2.5-7B"
+    device: str = "cuda"
+    dtype: str = "float16"
+    cache_dir: Optional[Path] = None
+
+
+class ProbeConfig(BaseModel):
+    """Probe configuration."""
+    max_new_tokens: int = 50
+    temperature: float = 0.8
+    do_sample: bool = True
+    num_runs: int = 5  # For distribution sampling
+
+
+class StorageConfig(BaseModel):
+    """Storage configuration."""
+    results_dir: Path = Path("results")
+    experiments_dir: Path = Path("experiments")
+
+
+class Config(BaseModel):
+    """Main configuration."""
+    model: ModelConfig = ModelConfig()
+    probe: ProbeConfig = ProbeConfig()
+    storage: StorageConfig = StorageConfig()
+
+    # Paths
+    project_root: Path = Path(__file__).parent.parent
+
+    class Config:
+        arbitrary_types_allowed = True
+
+
+# Default config instance
+config = Config()
+
+
+def get_config() -> Config:
+    """Get the current configuration."""
+    return config