chore(repo): run validate/windows only on PRs to avoid duplicate CI (#1928)

* ci(workflows): run validate/windows only on pull_request to avoid double runs\n\n- Remove redundant push triggers that caused duplicate runs for internal PR branches\n- Release workflow continues to handle push to master after merge\n\nresolves #1927

* ci(workflows): add workflow_dispatch to validate and windows workflows as requested\n\n- Allow manual runs via Actions UI on both workflows\n- Keep duplicate-run avoidance by staying PR-only; no concurrency added\n\nRefs #1927, follow-up to PR review by @shellscape

---------

Co-authored-by: CharlieHelps <charlie@charlielabs.ai>

Author: charliecreates[bot]

.github/workflows/node-windows.yml

@@ -6,10 +6,7 @@ on:
       - edited
       - opened
       - synchronize
-  push:
-    branches:
-      - '*'
-      - '!master'
+  workflow_dispatch:
 
 jobs:
   build:

.github/workflows/validate.yml

@@ -6,10 +6,7 @@ on:
       - edited
       - opened
       - synchronize
-  push:
-    branches:
-      - '*'
-      - '!master'
+  workflow_dispatch:
 
 jobs:
   build: