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-golang/references/queue-partitioning.md

@@ -0,0 +1,42 @@
+---
+title: Partition Queues for Per-Entity Limits
+impact: HIGH
+impactDescription: Enables per-entity concurrency control
+tags: queue, partition, per-user, dynamic
+---
+
+## Partition Queues for Per-Entity Limits
+
+Partitioned queues apply flow control limits per partition key instead of the entire queue. Each partition acts as a dynamic "subqueue".
+
+**Incorrect (global concurrency for per-user limits):**
+
+```go
+// Global concurrency=1 blocks ALL users, not per-user
+queue := dbos.NewWorkflowQueue(ctx, "tasks",
+	dbos.WithGlobalConcurrency(1),
+)
+```
+
+**Correct (partitioned queue):**
+
+```go
+queue := dbos.NewWorkflowQueue(ctx, "tasks",
+	dbos.WithPartitionQueue(),
+	dbos.WithGlobalConcurrency(1),
+)
+
+func onUserTask(ctx dbos.DBOSContext, userID, task string) error {
+	// Each user gets their own partition - at most 1 task per user
+	// but tasks from different users can run concurrently
+	_, err := dbos.RunWorkflow(ctx, processTask, task,
+		dbos.WithQueue(queue.Name),
+		dbos.WithQueuePartitionKey(userID),
+	)
+	return err
+}
+```
+
+When a queue has `WithPartitionQueue()` enabled, you **must** provide a `WithQueuePartitionKey()` when enqueuing. Partition keys and deduplication IDs cannot be used together.
+
+Reference: [Partitioning Queues](https://docs.dbos.dev/golang/tutorials/queue-tutorial#partitioning-queues)