Add LLM_Claude_Opus_47 run_claude_47 submission

submissions/inbox/LLM_Claude_Opus_47/run_claude_47/metadata.json

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+{
+  "team": "LLM_Claude_Opus_47",
+  "run_id": "run_claude_47",
+  "type": "llm",
+  "model": "GraphSAGE ",
+  "notes": "GNN-CB LLM baseline. Generated by Claude Opus 4.7 (claude-opus-4-7) under frozen prompt template prompt.md v1.1 (temperature=0, top_p=1, seed=42). Agent mode (Claude Code). Zero few-shot examples, zero per-task hints, zero prompt edits, zero repair iterations. Pipeline: BERT+spaCy+profile features (1078d), 2-layer GraphSAGE hidden=128, dropout=0.3, mean+max pool + root-MLP, BCEWithLogitsLoss, Adam lr=1e-3 wd=1e-4, batch=64, early stop on val F1 patience=5, threshold tuned on val (=0.53). Local val: F1=0.9768, Acc=0.9762. CPU only, wall-clock ~2 min."
+}