feat: Enhance search functionality with quality tiers and scoped indexing

- Updated `search_code` function to include a `quality` parameter for search quality tiers: "fast", "balanced", "thorough", and "auto".
- Introduced `search_scope` function to limit search results to a specific directory scope.
- Added `index_scope` function for indexing a specific directory without re-indexing the entire project.
- Refactored `SearchPipeline` to support quality-based routing in the `search` method.
- Implemented `Shard` and `ShardManager` classes to manage multiple index shards with LRU eviction and efficient file routing.
- Added debounce functionality in `IncrementalIndexer` to batch file events and reduce redundant processing.
- Enhanced `FileWatcher` to integrate with `IncrementalIndexer` for improved event handling.

.claude/skills/team-planex/roles/coordinator/commands/dispatch.md

@@ -32,7 +32,7 @@ Execution method: <agent|codex|gemini>
 ## Instructions
 1. Parse input to get issue list
 2. For each issue: call issue-plan-agent → write solution artifact
-3. After each solution: create EXEC-* task (owner: executor) with solution_file path
+3. After each solution: create EXEC-* task with solution_file path, then TaskUpdate to set owner: executor
 4. After all issues: send all_planned signal
 
 InnerLoop: true`,

.claude/skills/team-planex/roles/coordinator/role.md

@@ -46,7 +46,7 @@ For callback/check/resume: load `@commands/monitor.md` and execute the appropria
 
 1. Parse new input (Issue IDs / `--text` / `--plan`)
 2. Get current max PLAN-* sequence from `TaskList`
-3. `TaskCreate` new PLAN-00N task (owner: planner)
+3. `TaskCreate` new PLAN-00N task, then `TaskUpdate` to set owner: planner
 4. If planner already sent `all_planned` (check team_msg) -> `SendMessage` to planner to re-enter loop
 5. STOP