chore: point MSD at git.golem15.com/golem15/msd-core

The fork lives on the golem15 Gitea forge, not GitHub. Package identity now
parses either host and derives in-place raw URLs for Gitea; the identity-drift
lint accepts the new host; README drops GitHub-only badges and the npm
quickstart in favour of the checkout installer.

tests/forensics.test.cjs

@@ -144,25 +144,25 @@ describe('forensics workflow', () => {
     );
   });
 
-  test('workflow submits issues to golem15com/msd-core, not the current repo', () => {
+  test('workflow submits issues to golem15/msd-core, not the current repo', () => {
     const content = fs.readFileSync(workflowPath, 'utf-8');
     // Scope check to the gh issue create invocation — a whole-file search would
     // pass even if gh issue create lacked --repo, because gh label list also
     // contains the repo string.
     assert.match(
       content,
-      /gh issue create[\s\S]{0,250}--repo\s+golem15com\/msd-core/,
-      'gh issue create must use --repo golem15com/msd-core to avoid submitting to the user\'s current project repo'
+      /gh issue create[\s\S]{0,250}--repo\s+golem15\/msd-core/,
+      'gh issue create must use --repo golem15/msd-core to avoid submitting to the user\'s current project repo'
     );
   });
 
-  test('workflow checks bug label in golem15com/msd-core, not the current repo', () => {
+  test('workflow checks bug label in golem15/msd-core, not the current repo', () => {
     const content = fs.readFileSync(workflowPath, 'utf-8');
     // Regex is more robust than a fixed-length slice to formatting changes
     assert.match(
       content,
-      /gh label list[\s\S]{0,250}--repo\s+golem15com\/msd-core/,
-      'gh label list must target golem15com/msd-core'
+      /gh label list[\s\S]{0,250}--repo\s+golem15\/msd-core/,
+      'gh label list must target golem15/msd-core'
     );
   });