feat: add DBOS skills for TypeScript, Python, and Go (#94)

Add three DBOS SDK skills with reference documentation for building
reliable, fault-tolerant applications with durable workflows.

Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>

skills/dbos-python/references/lifecycle-fastapi.md

@@ -0,0 +1,66 @@
+---
+title: Integrate DBOS with FastAPI
+impact: CRITICAL
+impactDescription: Proper integration ensures workflows survive server restarts
+tags: fastapi, http, server, integration
+---
+
+## Integrate DBOS with FastAPI
+
+When using DBOS with FastAPI, configure and launch DBOS inside the main function before starting uvicorn.
+
+**Incorrect (configuration at module level):**
+
+```python
+from fastapi import FastAPI
+from dbos import DBOS, DBOSConfig
+
+app = FastAPI()
+
+# Don't configure at module level!
+config: DBOSConfig = {"name": "my-app"}
+DBOS(config=config)
+
+@app.get("/")
+@DBOS.workflow()
+def endpoint():
+    return {"status": "ok"}
+
+if __name__ == "__main__":
+    DBOS.launch()
+    uvicorn.run(app)
+```
+
+**Correct (configuration in main):**
+
+```python
+import os
+from fastapi import FastAPI
+from dbos import DBOS, DBOSConfig
+import uvicorn
+
+app = FastAPI()
+
+@DBOS.step()
+def process_data():
+    return "processed"
+
+@app.get("/")
+@DBOS.workflow()
+def endpoint():
+    result = process_data()
+    return {"result": result}
+
+if __name__ == "__main__":
+    config: DBOSConfig = {
+        "name": "my-app",
+        "system_database_url": os.environ.get("DBOS_SYSTEM_DATABASE_URL"),
+    }
+    DBOS(config=config)
+    DBOS.launch()
+    uvicorn.run(app, host="0.0.0.0", port=8000)
+```
+
+The workflow decorator can be combined with FastAPI route decorators. The FastAPI decorator should come first (outermost).
+
+Reference: [DBOS with FastAPI](https://docs.dbos.dev/python/tutorials/workflow-tutorial)