feat(FN-2962): merge fusion/fn-2962

- Add changeset for `@runfusion/fusion` minor release introducing custom provider registration support

Commits merged:
- feat(FN-2962): complete Step 8 — add changeset and documentation

Files changed:
.changeset/register-custom-providers.md | 5 +++++
 1 file changed, 5 insertions(+)

Fusion-Task-Id: FN-2962

packages/core/src/db.ts

@@ -86,7 +86,7 @@ export function probeFts5(db: DatabaseSync): boolean {
 
 // ── Schema Definition ────────────────────────────────────────────────
 
-const SCHEMA_VERSION = 53;
+const SCHEMA_VERSION = 54;
 
 function normalizeTaskComments(
   steeringComments: SteeringComment[] | undefined,
@@ -189,6 +189,8 @@ CREATE TABLE IF NOT EXISTS tasks (
   createdAt TEXT NOT NULL,
   updatedAt TEXT NOT NULL,
   columnMovedAt TEXT,
+  executionStartedAt TEXT,
+  executionCompletedAt TEXT,
   -- JSON columns for nested arrays/objects
   dependencies TEXT DEFAULT '[]',
   steps TEXT DEFAULT '[]',
@@ -1988,6 +1990,15 @@ export class Database {
       });
     }
 
+    // Wall-clock end-to-end execution timestamps for card runtime display.
+    // Set on first in-progress / done transitions, cleared only on retry.
+    if (version < 54) {
+      this.applyMigration(54, () => {
+        this.addColumnIfMissing("tasks", "executionStartedAt", "TEXT");
+        this.addColumnIfMissing("tasks", "executionCompletedAt", "TEXT");
+      });
+    }
+
   }
 
   /**