feat: implement memory and evidence administration with guided repairs

Add PostgreSQL-backed memory, editable evidence with source review and activation, and human-approved archive repairs across the harness, API, and UI. Include migrations, deployment support, regression coverage, and validation documentation.

Refresh permissions from validated session roles so existing administrator logins can access newly deployed archive management features.

backend/src/catalog/repository.ts

@@ -1604,6 +1604,7 @@ export class KyselyCatalogRepository implements CatalogRepository {
     scope: CatalogSyncScope,
     tableIds: readonly string[],
     snapshot: ObservedSchemaSnapshot,
+    syncRunId?: string,
   ): Promise<CatalogSyncCounts | undefined> {
     return await this.db.transaction().execute(async (trx) => {
       const database = await trx.selectFrom("workspaceDatabases").select("version")
@@ -1779,6 +1780,10 @@ export class KyselyCatalogRepository implements CatalogRepository {
           schemaSyncedAt: now,
         }).where("id", "=", databaseId).execute();
       }
+      if (syncRunId) {
+        await trx.updateTable("catalogSyncRuns").set({ phase: "memory_cleanup" })
+          .where("id", "=", syncRunId).where("databaseId", "=", databaseId).execute();
+      }
       return {
         tables: snapshot.tables.length,
         columns: scope === "tables" ? undefined : snapshot.columns.length,
@@ -1882,7 +1887,7 @@ export class KyselyCatalogRepository implements CatalogRepository {
 
   async interruptActiveSyncRuns(): Promise<void> {
     await this.db.updateTable("catalogSyncRuns").set({
-      state: "interrupted", phase: "completed", errorCode: "worker_restarted",
+      state: "interrupted", phase: sql`case when phase='memory_cleanup' then phase else 'completed' end`, errorCode: "worker_restarted",
       errorMessage: "Synchronization was interrupted by a backend restart.",
       finishedAt: sql`now()`, updatedAt: sql`now()`,
       leaseOwner: null, leaseExpiresAt: null,