chore: bootstrap project scaffolding

Add architecture doc (research-wiki/ARCHITECTURE.md), CLAUDE.md with
tiered SOP for Fable 5, adapted .claude skills/hooks/settings, package
skeleton (src/polygateway), pyproject with import-linter contracts,
Makefile, .env.example and smoke test.

Makefile

@@ -0,0 +1,31 @@
+.PHONY: install test lint format check ci wiki
+
+ENV := PolyGateway
+
+install:
+	conda run -n $(ENV) pip install -e ".[redis,postgres,structured,dev]"
+
+test:
+	conda run -n $(ENV) pytest tests/ --cov=src/polygateway --cov-report=term-missing
+
+# lint-imports 在 M1 模块落地前门控跳过（契约见 pyproject.toml [tool.importlinter]）
+lint:
+	conda run -n $(ENV) ruff check src/ tests/ --fix
+	@conda run -n $(ENV) python -c "import polygateway.ports" 2>/dev/null \
+	  && conda run -n $(ENV) lint-imports \
+	  || echo "import-linter: M1 模块未创建，跳过（契约已在 pyproject.toml 声明）"
+
+format:
+	conda run -n $(ENV) ruff format src/ tests/
+
+check:
+	conda run -n $(ENV) ruff format --check src/ tests/
+	conda run -n $(ENV) ruff check src/ tests/
+	@conda run -n $(ENV) python -c "import polygateway.ports" 2>/dev/null \
+	  && conda run -n $(ENV) lint-imports \
+	  || echo "import-linter: M1 模块未创建，跳过（契约已在 pyproject.toml 声明）"
+
+ci: check test
+
+wiki:
+	conda run -n $(ENV) python3 .claude/tools/research_wiki.py rebuild_index research-wiki/