ci: use go workspace for cross-module test resolution

CI workflows now run from the workspace root using go.work so
that local replace directives resolve correctly. This fixes the
framework test failure where contract v0.8.0 from the module
proxy was missing the new CreatedAt interface method.

Author: ConsoleTVs

.github/workflows/framework.yml

@@ -5,11 +5,13 @@ on:
     branches: ["main"]
     paths:
       - .github/workflows/framework.yml
+      - contract/**
       - framework/**
   pull_request:
     branches: ["main"]
     paths:
       - .github/workflows/framework.yml
+      - contract/**
       - framework/**
 
 jobs:
@@ -28,6 +30,9 @@ jobs:
           go-version-file: "framework/go.mod"
           cache-dependency-path: "framework/go.sum"
 
+      - name: Link local modules
+        run: go mod edit -replace github.com/studiolambda/cosmos/contract=../contract -replace github.com/studiolambda/cosmos/problem=../problem -replace github.com/studiolambda/cosmos/router=../router
+
       - name: Download Dependencies
         run: go mod download