refactor: replace Task tool with Agent tool and fix schema compliance

## Task -> Agent Replacement
- Replace all Task({}) calls with Agent({}) across .claude/ directory
- Update allowed-tools declarations from Task to Agent
- Update documentation references from "Task tool" to "Agent tool"

## Schema Compliance Fixes

### Agent Schema
- Add missing required `description` parameter in 6 files
- Add missing `run_in_background: false` for subagent calls
- Add missing `subagent_type` parameter

### AskUserQuestion Schema
- Fix issue-manage/SKILL.md: reduce options from 5 to 4 (max allowed)

### SendMessage Schema
- Fix team-worker.md: use correct params (type, content, summary)
- Remove invalid `team_name` parameter

### TaskCreate/TaskUpdate Schema
- Remove invalid `blockedBy`, `owner`, `status` from TaskCreate calls
- Use separate TaskUpdate calls for dependencies and ownership
- Fix TaskUpdate syntax to use object parameter

### TeamDelete Schema
- Remove parameters from TeamDelete() calls (should be no params)

### TaskOutput Schema
- Fix Python-style syntax to JavaScript object syntax

## Files Changed
- 146 files updated across commands/, skills/, skills_lib/, agents/

.claude/skills/team-perf-opt/roles/coordinator/commands/monitor.md

@@ -65,7 +65,7 @@ Find and spawn the next ready tasks.
 2. For each ready task, spawn team-worker:
 
 ```
-Task({
+Agent({
   subagent_type: "team-worker",
   description: "Spawn <role> worker for <task-id>",
   team_name: "perf-opt",

.claude/skills/team-perf-opt/roles/coordinator/role.md

@@ -229,7 +229,7 @@ Execute `commands/dispatch.md` inline (Command Execution Protocol):
 Find first unblocked task and spawn its worker:
 
 ```
-Task({
+Agent({
   subagent_type: "team-worker",
   description: "Spawn profiler worker",
   team_name: "perf-opt",
@@ -298,6 +298,6 @@ AskUserQuestion({
 
 | Choice | Steps |
 |--------|-------|
-| Archive & Clean | TaskList -> verify all completed -> update session status="completed" -> TeamDelete("perf-opt") -> output final summary with artifact paths |
+| Archive & Clean | TaskList -> verify all completed -> update session status="completed" -> TeamDelete() -> output final summary with artifact paths |
 | Keep Active | Update session status="paused" -> output: "Session paused. Resume with: Skill(skill='team-perf-opt', args='resume')" |
 | Export Results | AskUserQuestion for target directory -> copy all artifacts -> Archive & Clean flow |