fix: record truncation event when condensation fails but truncation succeeds

The else-if chain in attemptApiRequest() prevented both error AND truncation
events from being recorded when context condensation fails but sliding window
truncation succeeds as a fallback.

When manageContext() returns both 'error' (condensation failed) and
'truncationId' (truncation happened as fallback), only the error was shown
because of the else-if chain. This meant the sliding_window_truncation
clineMessage was never created, breaking rewind functionality since
MessageManager.collectRemovedContextEventIds() couldn't find the truncation ID
to clean up orphaned truncationParent tags.

Fix: Change 'else if' to separate 'if' statements so both events can be
recorded, allowing rewind to properly restore hidden messages.

Author: hannesrudolph

src/core/task/Task.ts

@@ -4012,7 +4012,8 @@ export class Task extends EventEmitter<TaskEvents> implements TaskLike {
 				}
 				if (truncateResult.error) {
 					await this.say("condense_context_error", truncateResult.error)
-				} else if (truncateResult.summary) {
+				}
+				if (truncateResult.summary) {
 					const { summary, cost, prevContextTokens, newContextTokens = 0, condenseId } = truncateResult
 					const contextCondense: ContextCondense = {
 						summary,