Use manual image build due to Oracle GH restrictions

Signed-off-by: Gerald Venzl <[email protected]>

Author: gvenzl

.github/workflows/build-doc-mcp.yml

@@ -3,9 +3,11 @@ on:
   push:
     paths:
       - "src/oracle-db-doc-mcp-server/**"
+      - ".github/workflows/build-doc-mcp.yml"
   pull_request:
     paths:
       - "src/oracle-db-doc-mcp-server/**"
+      - ".github/workflows/build-doc-mcp.yml"
 
 jobs:
   build-image: