Fix Windows test failures in cache_test by using paths instead of URIs

Tests passed `identity` as uri->filename-fn but used `file:///` URIs,
causing InvalidPathException on Windows due to the colon in `file:`.

🤖 Generated with [eca](https://eca.dev)

Co-Authored-By: eca <noreply@eca.dev>

Author: ericdallo

test/eca/cache_test.clj

@@ -50,19 +50,19 @@
 (deftest workspace-dir-name-test
   (let [dir-name #'cache/workspace-dir-name]
     (testing "prefixes hash with project name from first workspace URI"
-      (let [workspaces [{:uri "file:///home/user/my-project"}]
+      (let [workspaces [{:uri "/home/user/my-project"}]
             result (dir-name workspaces identity)]
         (is (re-matches #"my-project_.{8}" result))))
 
     (testing "sanitizes unsafe filesystem characters"
-      (let [workspaces [{:uri "file:///home/user/my project@v2!"}]
+      (let [workspaces [{:uri "/home/user/my project@v2!"}]
             result (dir-name workspaces identity)]
         (is (re-matches #"my_project_v2__.{8}" result))
         (is (nil? (re-find #"[ @!]" result)))))
 
     (testing "truncates long project names to 30 chars"
       (let [long-name (apply str (repeat 50 "a"))
-            workspaces [{:uri (str "file:///home/user/" long-name)}]
+            workspaces [{:uri (str "/home/user/" long-name)}]
             result (dir-name workspaces identity)]
         (is (<= (count result) (+ 30 1 8)))))
 
@@ -71,15 +71,15 @@
         (is (re-matches #".{8}" result))))
 
     (testing "uses first workspace name when multiple workspaces"
-      (let [workspaces [{:uri "file:///home/user/first-project"}
-                        {:uri "file:///home/user/second-project"}]
+      (let [workspaces [{:uri "/home/user/first-project"}
+                        {:uri "/home/user/second-project"}]
             result (dir-name workspaces identity)]
         (is (re-matches #"first-project_.{8}" result))))))
 
 (deftest workspace-cache-file-migration-test
   (testing "migrates old hash-only directory to new format"
     (with-temp-cache-dir
-      (let [workspaces [{:uri "file:///home/user/my-project"}]
+      (let [workspaces [{:uri "/home/user/my-project"}]
             hash-only (cache/workspaces-hash workspaces identity)
             old-dir (io/file (cache/global-dir) hash-only)]
         ;; Create old-format directory with a cache file
@@ -94,7 +94,7 @@
 
   (testing "does not migrate when new directory already exists"
     (with-temp-cache-dir
-      (let [workspaces [{:uri "file:///home/user/my-project"}]
+      (let [workspaces [{:uri "/home/user/my-project"}]
             hash-only (cache/workspaces-hash workspaces identity)
             old-dir (io/file (cache/global-dir) hash-only)
             result-before (cache/workspace-cache-file workspaces "db.transit.json" identity)