Fix Elasticsearch blob results linking to the wrong reference ID

If Elasticsearch returned a hit for a blob, clicking on the link would
always return a 404 since the OID, not the commit SHA, was being used.

CHANGELOG

 Please view this file on the master branch, on stable branches it's out of date.
 
 v 8.5.0 (unreleased)
+  - Fix Elasticsearch blob results linking to the wrong reference ID (Stan Hu)
   - Cache various Repository methods to improve performance (Yorick Peterse)
   - Ensure rake tasks that don't need a DB connection can be run without one
   - Update New Relic gem to 3.14.1.311 (Stan Hu)

app/models/repository.rb

@@ -710,7 +710,7 @@ class Repository
   end
 
   def parse_search_result_from_elastic(result)
-    ref = result["_source"]["blob"]["oid"]
+    ref = result["_source"]["blob"]["commit_sha"]
     filename = result["_source"]["blob"]["path"]
     content = result["_source"]["blob"]["content"]
     total_lines = content.lines.size

spec/models/repository_spec.rb

@@ -393,6 +393,7 @@ describe Repository, models: true do
 
         parsed_result = project.repository.parse_search_result_from_elastic(result)
 
+        expect(parsed_result.ref). to eq('5937ac0a7beb003549fc5fd26fc247adbce4a52e')
         expect(parsed_result.filename).to eq('files/ruby/popen.rb')
         expect(parsed_result.startline).to eq(2)
         expect(parsed_result.data).to include("Popen")