fix: Resolve test 19_github_api ownership errors in CI

- Change github_commits to TEMP TABLE to prevent persistence
- Add explicit DROP TABLE github_commits in cleanup
- Add --clean flag to CI E2E tests to clear cached data directories

Fixes ownership error "must be owner of table github_commits" that
occurred due to persistent tables in cached ~/.pgrx data directories.

Author: pinodeca

.github/workflows/ci.yml

@@ -128,11 +128,11 @@ jobs:
 
       - name: Run E2E tests (shared_preload_libraries enforcement)
         id: e2e_no_preload
-        run: ./scripts/test-e2e-local.sh --no-preload
+        run: ./scripts/test-e2e-local.sh --clean --no-preload
 
       - name: Run E2E tests
         id: e2e_tests
-        run: ./scripts/test-e2e-local.sh --pg-version ${{ matrix.pg_version }}
+        run: ./scripts/test-e2e-local.sh --clean --pg-version ${{ matrix.pg_version }}
 
       - name: Upload PostgreSQL logs on E2E failure
         if: failure()

tests/e2e/sql/19_github_api.sql

@@ -7,7 +7,7 @@
 -- ============================================================================
 
 DROP TABLE IF EXISTS github_commits;
-CREATE TABLE github_commits (
+CREATE TEMP TABLE github_commits (
     id SERIAL PRIMARY KEY,
     sha TEXT UNIQUE,
     author TEXT,
@@ -102,6 +102,7 @@ SELECT sha, author, committed_at, LEFT(message, 50) AS message FROM github_commi
 
 -- Cleanup
 DROP TABLE _test_github;
+DROP TABLE github_commits;
 SELECT df.clearvars();
 
 SELECT 'TEST PASSED' AS result;