WIP: add permission trace tier docs

Author: katmayb

src/langsmith/abac.mdx

@@ -100,7 +100,7 @@ Each condition group specifies:
 
 | Resource type | Supported permissions |
 |---------------|----------------------|
-| `project` | `projects:read`, `projects:update`, `projects:delete`, `runs:read`, `runs:share`, `runs:delete` |
+| `project` | `projects:read`, `projects:update`, `projects:delete`, `runs:read`, `runs:share`, `runs:delete`, `projects:increase-trace-tier`, `projects:decrease-trace-tier` |
 | `prompt` | `prompts:read`, `prompts:update`, `prompts:delete`, `prompts:share`, `prompts:tag` |
 | `dataset` | `datasets:read`, `datasets:update`, `datasets:delete`, `datasets:share` |
 | `deployment` | `deployments:read`, `deployments:update`, `deployments:delete` |

src/langsmith/organization-workspace-operations.mdx

@@ -197,7 +197,8 @@ Projects organize traces and runs from your LLM applications.
 | View prebuilt dashboard | ✓ | ✓ | ✓ | `projects:read` |
 | View project metadata (top K values) | ✓ | ✓ | ✓ | `projects:read` |
 | Update project metadata (name, description, tags) | ✓ | ✓ | ✗ | `projects:update` |
-| Update project trace retention (base/extended) | ✓ | ✓ | ✗ | `projects:update` |
+| Increase project trace retention (base → extended) | ✓ | ✓ | ✗ | `projects:increase-trace-tier` |
+| Decrease project trace retention (extended → base) | ✓ | ✓ | ✗ | `projects:decrease-trace-tier` |
 | Create filter view | ✓ | ✗ | ✗ | `projects:create` |
 | View filter views | ✓ | ✓ | ✓ | `projects:read` |
 | View specific filter view | ✓ | ✓ | ✓ | `projects:read` |