wip(TRUEREF-0018): commit version-scoped indexing work

src/lib/server/db/schema.ts

@@ -37,6 +37,7 @@ export const repositoryVersions = sqliteTable('repository_versions', {
 		.references(() => repositories.id, { onDelete: 'cascade' }),
 	tag: text('tag').notNull(), // git tag or branch name
 	title: text('title'),
+	commitHash: text('commit_hash'), // immutable commit SHA-1 resolved from tag
 	state: text('state', {
 		enum: ['pending', 'indexing', 'indexed', 'error']
 	})
@@ -135,7 +136,7 @@ export const repositoryConfigs = sqliteTable('repository_configs', {
 	excludeFiles: text('exclude_files', { mode: 'json' }).$type<string[]>(),
 	rules: text('rules', { mode: 'json' }).$type<string[]>(),
 	previousVersions: text('previous_versions', { mode: 'json' }).$type<
-		{ tag: string; title: string }[]
+		{ tag: string; title: string; commitHash?: string }[]
 	>(),
 	updatedAt: integer('updated_at', { mode: 'timestamp' }).notNull()
 });