Fix CI: replace deprecated macos-13 runner, eliminate duplicate workflow runs

Replace macos-13 with macos-15 for x86_64 builds (macos-13 runner retired by GitHub).
Restrict push trigger to master/main branches across all test workflows to prevent
duplicate runs when pushing to PR branches.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: fcostaoliveira

.github/workflows/publish-pypi.yml

@@ -17,7 +17,7 @@ jobs:
             target: x86_64
           - os: ubuntu-latest
             target: aarch64
-          - os: macos-13
+          - os: macos-15
             target: x86_64
           - os: macos-14
             target: aarch64

.github/workflows/test-basic-functionality-redis-vector-sets-rs.yml

@@ -2,6 +2,7 @@ name: Test Basic Functionality - Redis Vector Sets (Rust)
 
 on:
   push:
+    branches: [master, main]
   pull_request:
 
 jobs:

.github/workflows/test-basic-functionality-redis-vector-sets.yml

@@ -2,6 +2,7 @@ name: Test Basic Functionality - Redis Vector Sets
 
 on:
   push:
+    branches: [master, main]
   pull_request:
 
 jobs:

.github/workflows/test-basic-functionality-redisearch-rs.yml

@@ -2,6 +2,7 @@ name: Test Basic Functionality - Redis RediSearch (Rust)
 
 on:
   push:
+    branches: [master, main]
   pull_request:
 
 jobs:

.github/workflows/test-basic-functionality-redisearch.yml

@@ -2,6 +2,7 @@ name: Test Basic Functionality - Redis RediSearch
 
 on:
   push:
+    branches: [master, main]
   pull_request:
 
 jobs:

.github/workflows/test-build-packages.yml

@@ -2,6 +2,7 @@ name: Test Package Builds
 
 on:
   push:
+    branches: [master, main]
   pull_request:
 
 jobs:
@@ -25,7 +26,7 @@ jobs:
           - os: macos-14
             target: aarch64
             python-version: '3.13'
-          - os: macos-13
+          - os: macos-15
             target: x86_64
             python-version: '3.10'
           - os: windows-latest