chore: initial commit — unified project repo

Merged code repo (CompanionGuard-RL) into single project-level git.
Reorganized root: docs/, reference/, experiments/, tmp/active|archives/.
Gitignored: data/, checkpoints/, .venv, experiment logs, tmp/archives.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

code/requirements.txt

@@ -0,0 +1,35 @@
+torch>=2.0.0
+transformers>=4.40.0
+peft>=0.10.0
+accelerate>=0.27.0
+datasets>=2.18.0
+tokenizers>=0.15.0
+
+# RL
+gymnasium>=0.29.0
+stable-baselines3>=2.2.0
+
+# LLM API
+openai>=1.20.0
+anthropic>=0.25.0
+dashscope>=1.18.0
+
+# Experiment tracking
+wandb>=0.16.0
+
+# Data processing
+pandas>=2.0.0
+numpy>=1.24.0
+scikit-learn>=1.3.0
+tqdm>=4.66.0
+
+# Evaluation
+scipy>=1.11.0
+
+# Config
+pyyaml>=6.0
+omegaconf>=2.3.0
+
+# Utilities
+jsonlines>=4.0.0
+rich>=13.0.0