refactor(test): drop issue-number refs and redundant integration test (review)

The unit test in lifecycle_test.go already pins the stripped prompt
end-to-end through ParseHookEvent, so the integration file duplicated
coverage. Issue references removed from code comments per review.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Entire-Checkpoint: 01KXJNYKYC9AK1B7PC6ZAW6AZP

Author: gtrrz-victor

cmd/entire/cli/agent/claudecode/lifecycle.go

@@ -140,7 +140,7 @@ func (c *ClaudeCodeAgent) parseTurnStart(stdin io.Reader) (*agent.Event, error)
 		SessionRef: raw.TranscriptPath,
 		// Strip IDE-injected context (e.g. <ide_opened_file> from the VS Code
 		// extension) so the session/checkpoint title and prompt show what the
-		// user actually typed, not the injected block (#1423).
+		// user actually typed, not the injected block.
 		Prompt:    textutil.StripIDEContextTags(raw.Prompt),
 		Timestamp: time.Now(),
 	}, nil

cmd/entire/cli/agent/claudecode/lifecycle_test.go

@@ -99,9 +99,9 @@ func TestParseHookEvent_TurnStart(t *testing.T) {
 	}
 }
 
-// Regression for #1423: the VS Code extension prepends an <ide_opened_file>
-// context block to the prompt; it must be stripped so the session/checkpoint
-// title and prompt show only what the user typed.
+// The VS Code extension prepends an <ide_opened_file> context block to the
+// prompt; it must be stripped so the session/checkpoint title and prompt show
+// only what the user typed.
 func TestParseHookEvent_TurnStart_StripsIDEContextTags(t *testing.T) {
 	t.Parallel()