feat: initial monorepo scaffold - Next.js 15 + Prisma + Python SDK stubs

- Turborepo monorepo with apps/web and packages/database, sdk-python
- Next.js 15 app with professional landing page (dark theme, emerald accent)
- Prisma schema: Trace, DecisionPoint, Span, Event models with full indexing
- Docker Compose: web (port 4200), postgres:16, redis:7, migrate service
- Python SDK package stubs: init, trace decorator, log_decision, integrations
- Multi-stage Dockerfile for standalone Next.js production build

packages/sdk-python/pyproject.toml

@@ -0,0 +1,33 @@
+[build-system]
+requires = ["hatchling"]
+build-backend = "hatchling.backends"
+
+[project]
+name = "agentlens"
+version = "0.1.0"
+description = "Agent observability that traces decisions, not just API calls"
+readme = "README.md"
+license = "MIT"
+requires-python = ">=3.9"
+authors = [{ name = "Vectry", email = "hunter@repi.fun" }]
+keywords = ["ai", "agents", "observability", "tracing", "llm"]
+classifiers = [
+    "Development Status :: 3 - Alpha",
+    "Intended Audience :: Developers",
+    "License :: OSI Approved :: MIT License",
+    "Programming Language :: Python :: 3",
+    "Topic :: Software Development :: Libraries",
+]
+dependencies = [
+    "httpx>=0.25.0",
+]
+
+[project.optional-dependencies]
+langchain = ["langchain-core>=0.1.0"]
+openai = ["openai>=1.0.0"]
+all = ["agentlens[langchain,openai]"]
+
+[project.urls]
+Homepage = "https://agentlens.vectry.tech"
+Repository = "https://gitea.repi.fun/repi/agentlens"
+Documentation = "https://agentlens.vectry.tech/docs"