chore: Phase 4 - Deploy workflow to manual-only mode

- Removed automatic 'push' trigger from deploy-prod.yml
- Now workflow_dispatch only (manual deployment)
- Automatic deployment handled by merge-to-main.yml (Stage 5)
- Prevents duplicate deployment runs

Benefits:
- Single source of truth for automated deployment (merge-to-main.yml)
- Manual override available via workflow_dispatch
- Cleaner workflow execution on main branch push
- Easier to debug/monitor single deployment process

Co-Authored-By: Claude Haiku 4.5 <noreply@anthropic.com>

.gitea/workflows/.archived/build.yml.archived

@@ -1,10 +1,10 @@
-name: Build & Package
+name: ARCHIVED - Build & Package (replaced by merge-to-main.yml)
 
+# This workflow has been replaced by .gitea/workflows/merge-to-main.yml
+# Triggers are disabled. Kept for reference only.
 on:
-  push:
-    branches:
-      - main
-  workflow_dispatch:
+  # DISABLED - use merge-to-main.yml instead
+  workflow_dispatch: ~
 
 env:
   DOTNET_VERSION: '10.0.x'

.gitea/workflows/ci.yml

@@ -1,17 +1,13 @@
-name: Quant Engine CI/CD Pipeline
+name: Validators (Pull Requests Only)
 
 on:
-  push:
-    branches: [ main ]
   pull_request:
     branches: [ main ]
   workflow_dispatch:
 
-# ─────────────────────────────────────────────────────────────────
-# CI 역할: 코드 구조 검증 게이트 (순수 Python, yaml/json)
-#   - Validate Specs / Formula Registry / Coverage / Behavioral Coverage
-# 통합 테스트(run_release_dag, ingest 등)는 로컬 또는 클라우드 서버에서 실행
-# ─────────────────────────────────────────────────────────────────
+# Phase 3: Validator pipeline
+# Main branch push validation moved to merge-to-main.yml
+# This workflow runs validators only on PRs for feedback
 
 jobs:
   validate-core:

.gitea/workflows/deploy-prod.yml

@@ -1,11 +1,12 @@
-name: Deploy to Production (Local)
+name: Deploy to Production (Manual)
 
 on:
-  push:
-    branches:
-      - main
   workflow_dispatch:
 
+# Phase 4: Manual-only deployment
+# Automatic deployment moved to merge-to-main.yml (Stage 5)
+# Use this workflow for manual deployments when needed
+
 concurrency:
   group: deploy-prod-main
   cancel-in-progress: true