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/workflow-introspection.md

@@ -0,0 +1,68 @@
+---
+title: List and Inspect Workflows
+impact: MEDIUM
+impactDescription: Enables monitoring and management of workflow state
+tags: workflow, list, introspection, status, monitoring
+---
+
+## List and Inspect Workflows
+
+Use `DBOS.list_workflows()` to query workflows by status, name, queue, or other criteria.
+
+**Incorrect (loading unnecessary data):**
+
+```python
+# Loading inputs/outputs when not needed is slow
+workflows = DBOS.list_workflows(status="PENDING")
+for w in workflows:
+    print(w.workflow_id)  # Only using ID
+```
+
+**Correct (optimize with load flags):**
+
+```python
+# Disable loading inputs/outputs for better performance
+workflows = DBOS.list_workflows(
+    status="PENDING",
+    load_input=False,
+    load_output=False
+)
+for w in workflows:
+    print(f"{w.workflow_id}: {w.status}")
+```
+
+Common queries:
+
+```python
+# Find failed workflows
+failed = DBOS.list_workflows(status="ERROR", limit=100)
+
+# Find workflows by name
+processing = DBOS.list_workflows(
+    name="process_task",
+    status=["PENDING", "ENQUEUED"]
+)
+
+# Find workflows on a specific queue
+queued = DBOS.list_workflows(queue_name="high_priority")
+
+# Only queued workflows (shortcut)
+queued = DBOS.list_queued_workflows(queue_name="task_queue")
+
+# Find old version workflows for blue-green deploys
+old = DBOS.list_workflows(
+    app_version="1.0.0",
+    status=["PENDING", "ENQUEUED"]
+)
+
+# Get workflow steps
+steps = DBOS.list_workflow_steps(workflow_id)
+for step in steps:
+    print(f"Step {step['function_id']}: {step['function_name']}")
+```
+
+WorkflowStatus fields: `workflow_id`, `status`, `name`, `queue_name`, `created_at`, `input`, `output`, `error`
+
+Status values: `ENQUEUED`, `PENDING`, `SUCCESS`, `ERROR`, `CANCELLED`, `MAX_RECOVERY_ATTEMPTS_EXCEEDED`
+
+Reference: [Workflow Management](https://docs.dbos.dev/python/tutorials/workflow-management)