fix(databases): address PR review — use attribute.attribute and fix removal test

- resources/databases.ts: use `attribute.attribute` instead of `attribute.name`
  in the non-indexed attribute findIndex (per cb1kenobi's suggestion; `attribute.name`
  can be falsey for attributes that arrive with only the `attribute` field set).
- unitTests/resources/schemaMigrationFragility.test.js: fix removal regression test —
  after `table()` updates in-memory Table.attributes, re-create the stale main-thread
  state (still holding breed/age) before calling resetDatabases(), so the removal loop
  in initStores() is actually exercised.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: kriszyp

resources/databases.ts

@@ -626,7 +626,7 @@ function initStores(
 					// hot-reload / worker restart. Without this, resetDatabases() re-reads these attributes
 					// from attributesDbi but never merges them back into table.attributes — causing stale
 					// schema metadata until a full kill+restart. (RE-7)
-					const existingIdx = existingAttributes.findIndex((ea) => ea.name === attribute.name);
+					const existingIdx = existingAttributes.findIndex((ea) => ea.name === attribute.attribute);
 					if (existingIdx >= 0) {
 						existingAttributes.splice(existingIdx, 1, attribute);
 					} else {

unitTests/resources/schemaMigrationFragility.test.js

@@ -455,6 +455,17 @@ describe('schema-migration fragility: non-indexed attributes missing from table.
 				{ name: 'name' },
 			],
 		});
+		// table() updates in-memory Table.attributes directly (databases.ts:997), so after the
+		// call above the in-memory state is already [id, name].  Re-create the stale main-thread
+		// view — still holding the old [id, name, breed, age] — so that the removal loop in
+		// initStores() actually needs to drop breed and age.
+		const tblForRemoval = getDatabases()[DB]?.[TABLE];
+		tblForRemoval.attributes.splice(0, tblForRemoval.attributes.length,
+			{ name: 'id', isPrimaryKey: true },
+			{ name: 'name' },
+			{ name: 'breed' },
+			{ name: 'age' },
+		);
 		resetDatabases();
 		const tbl = getDatabases()[DB]?.[TABLE];
 		const attrNames = tbl.attributes.map((a) => a.name);