fix: integrate todo-codebase-compaction hook properly

- Import PreemptiveCompactionOptions type
- Export hook from hooks/index.ts
- Add todo-codebase-compaction to HookNameSchema
- Use todoCodebaseCompactionInjector when hook is enabled

src/hooks/todo-codebase-compaction/index.ts

@@ -1,4 +1,4 @@
-import type { SummarizeContext } from "../preemptive-compaction"
+import type { SummarizeContext, PreemptiveCompactionOptions } from "../preemptive-compaction"
 import { injectHookMessage } from "../../features/hook-message-injector"
 import { log } from "../../shared/logger"
 import { createPreemptiveCompactionHook } from "../preemptive-compaction"