chore: project skeleton with uv + pyproject + deps

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

.env.example

@@ -0,0 +1,15 @@
+# Cerbero MCP (locale durante Phase 1)
+CERBERO_BASE_URL=http://localhost:9000
+CERBERO_TESTNET_TOKEN=
+CERBERO_MAINNET_TOKEN=
+CERBERO_BOT_TAG=swarm-poc-phase1
+
+# LLM providers
+OPENROUTER_API_KEY=
+ANTHROPIC_API_KEY=
+
+# Run config
+RUN_NAME=phase1-spike-001
+DATA_DIR=./data
+SERIES_DIR=./series
+DB_PATH=./runs.db