ci: stop firing unity-tests/python-tests twice for beta and main pushes

A push to beta (or main) that touches MCPForUnity/** or Server/** triggers
the test workflow via two paths:

  push to beta ─┬─► unity-tests.yml  (direct push trigger, branches: ["**"])
                │
                └─► beta-release.yml ──workflow_call──► unity-tests.yml

Both invocations land in GitHub's auto-generated concurrency group
`unity-tests-refs/heads/beta`, so the later one cancels the earlier with
the noisy "Canceling since a higher priority waiting request for
unity-tests-refs/heads/beta exists" annotation. The cancelled run shows
red on the Actions page even though the workflow_call sibling completed
fine.

Switch the direct push trigger to `branches-ignore: [beta, main]` on both
unity-tests.yml and python-tests.yml. Coverage on those branches is still
delivered through workflow_call from beta-release.yml / release.yml; we
just stop firing a duplicate run that gets killed by concurrency. PR
checks, feature-branch pushes, and manual workflow_dispatch invocations
are unaffected.

Author: Scriptwonder

.github/workflows/python-tests.yml

@@ -2,7 +2,11 @@ name: Python Tests
 
 on:
   push:
-    branches: ["**"]
+    # Exclude beta and main: those branches re-trigger this workflow via
+    # workflow_call from beta-release.yml / release.yml. Without the exclusion,
+    # a push to beta that touches Server/** fires this workflow twice for the
+    # same SHA, and GitHub auto-cancels the duplicate.
+    branches-ignore: [beta, main]
     paths:
       - Server/**
       - .github/workflows/python-tests.yml

.github/workflows/unity-tests.yml

@@ -10,7 +10,13 @@ on:
         required: false
         default: ""
   push:
-    branches: ["**"]
+    # Exclude beta and main: those branches re-trigger this workflow via
+    # workflow_call from beta-release.yml / release.yml. Without the exclusion,
+    # a push to beta that touches MCPForUnity/** fires this workflow twice
+    # for the same SHA, and GitHub's auto-generated concurrency group
+    # (`unity-tests-refs/heads/beta`) cancels the older run with the noisy
+    # "higher priority waiting request" annotation.
+    branches-ignore: [beta, main]
     paths:
       - TestProjects/UnityMCPTests/**
       - MCPForUnity/Editor/**