docs: auto-generate API route documentation

Signed-off-by: NotAShelf <raf@notashelf.dev>
Change-Id: Id0d1f9769b7ccdbf83d5fa78adef62e46a6a6964

docs/api/scan.md

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+# Scan
+
+Directory scanning
+
+## Endpoints
+
+### POST /api/v1/scan
+
+Trigger a scan as a background job. Returns the job ID immediately.
+
+**Authentication:** Required (Bearer JWT)
+
+#### Request Body
+
+`Content-Type: application/json`
+
+See `docs/api/openapi.json` for the full schema.
+
+#### Responses
+
+| Status | Description |
+|--------|-------------|
+| 200 | Scan job submitted |
+| 401 | Unauthorized |
+| 403 | Forbidden |
+| 500 | Internal server error |
+
+---
+
+### GET /api/v1/scan/status
+
+**Authentication:** Required (Bearer JWT)
+
+#### Responses
+
+| Status | Description |
+|--------|-------------|
+| 200 | Scan status |
+| 401 | Unauthorized |
+
+---
+