fix: resolve golangci-lint failures in jfrog storage implementation

- Remove unused pathCache field from PublishedStorage struct
- Remove unused md5s accumulation in Filelist()
- Fix unchecked error return on expectedOut.Write in config_test.go
- Suppress unused linter on configFileYAML/configFileYAMLError constants
  (retained to avoid merge conflicts with feat/pls/gcs-support)
- Add --timeout=10m to golangci-lint workflow
- add back removed tests

utils/config_test.go

@@ -197,6 +197,127 @@ func (s *ConfigSuite) TestSaveConfig(c *C) {
 }`)
 }
 
+func (s *ConfigSuite) TestLoadYAMLConfig(c *C) {
+  configname := filepath.Join(c.MkDir(), "aptly.yaml1")
+  f, _ := os.Create(configname)
+  _, _ = f.WriteString(configFileYAML)
+  _ = f.Close()
+
+  // start with empty config
+  s.config = ConfigStructure{}
+
+  err := LoadConfig(configname, &s.config)
+  c.Assert(err, IsNil)
+  c.Check(s.config.GetRootDir(), Equals, "/opt/aptly/")
+  c.Check(s.config.DownloadConcurrency, Equals, 40)
+  c.Check(s.config.DatabaseOpenAttempts, Equals, 10)
+}
+
+func (s *ConfigSuite) TestLoadYAMLErrorConfig(c *C) {
+  configname := filepath.Join(c.MkDir(), "aptly.yaml2")
+  f, _ := os.Create(configname)
+  _, _ = f.WriteString(configFileYAMLError)
+  _ = f.Close()
+
+  // start with empty config
+  s.config = ConfigStructure{}
+
+  err := LoadConfig(configname, &s.config)
+  c.Assert(err.Error(), Equals, "invalid yaml (unknown pool storage type: invalid) or json (invalid character 'p' looking for beginning of value)")
+}
+
+func (s *ConfigSuite) TestSaveYAMLConfig(c *C) {
+  configname := filepath.Join(c.MkDir(), "aptly.yaml3")
+  f, _ := os.Create(configname)
+  _, _ = f.WriteString(configFileYAML)
+  _ = f.Close()
+
+  // start with empty config
+  s.config = ConfigStructure{}
+
+  err := LoadConfig(configname, &s.config)
+  c.Assert(err, IsNil)
+
+  err = SaveConfigYAML(configname, &s.config)
+  c.Assert(err, IsNil)
+
+  f, _ = os.Open(configname)
+  defer func() {
+    _ = f.Close()
+  }()
+
+  st, _ := f.Stat()
+  buf := make([]byte, st.Size())
+  _, _ = f.Read(buf)
+
+  c.Check(string(buf), Equals, configFileYAML)
+}
+
+func (s *ConfigSuite) TestSaveYAML2Config(c *C) {
+  // start with empty config
+  s.config = ConfigStructure{}
+
+  s.config.PackagePoolStorage.Local = &LocalPoolStorage{"/tmp/aptly-pool"}
+  s.config.PackagePoolStorage.Azure = nil
+
+  configname := filepath.Join(c.MkDir(), "aptly.yaml4")
+  err := SaveConfigYAML(configname, &s.config)
+  c.Assert(err, IsNil)
+
+  f, _ := os.Open(configname)
+  defer func() {
+    _ = f.Close()
+  }()
+
+  st, _ := f.Stat()
+  buf := make([]byte, st.Size())
+  _, _ = f.Read(buf)
+
+  c.Check(string(buf), Equals, ""+
+    "root_dir: \"\"\n"+
+    "log_level: \"\"\n"+
+    "log_format: \"\"\n"+
+    "database_open_attempts: 0\n"+
+    "architectures: []\n"+
+    "skip_legacy_pool: false\n"+
+    "dep_follow_suggests: false\n"+
+    "dep_follow_recommends: false\n"+
+    "dep_follow_all_variants: false\n"+
+    "dep_follow_source: false\n"+
+    "dep_verboseresolve: false\n"+
+    "ppa_distributor_id: \"\"\n"+
+    "ppa_codename: \"\"\n"+
+    "ppa_baseurl: \"\"\n"+
+    "serve_in_api_mode: false\n"+
+    "enable_metrics_endpoint: false\n"+
+    "enable_swagger_endpoint: false\n"+
+    "async_api: false\n"+
+    "database_backend:\n"+
+    "    type: \"\"\n"+
+    "    db_path: \"\"\n"+
+    "    url: \"\"\n"+
+    "downloader: \"\"\n"+
+    "download_concurrency: 0\n"+
+    "download_limit: 0\n"+
+    "download_retries: 0\n"+
+    "download_sourcepackages: false\n"+
+    "gpg_provider: \"\"\n"+
+    "gpg_disable_sign: false\n"+
+    "gpg_disable_verify: false\n"+
+    "gpg_keys: []\n"+
+    "skip_contents_publishing: false\n"+
+    "skip_bz2_publishing: false\n"+
+    "filesystem_publish_endpoints: {}\n"+
+    "jfrog_publish_endpoints: {}\n"+
+    "s3_publish_endpoints: {}\n"+
+    "gcs_publish_endpoints: {}\n"+
+    "swift_publish_endpoints: {}\n"+
+    "azure_publish_endpoints: {}\n"+
+    "packagepool_storage:\n"+
+    "    type: local\n"+
+    "    path: /tmp/aptly-pool\n")
+}
+
 func (s *ConfigSuite) TestLoadEmptyConfig(c *C) {
 	configname := filepath.Join(c.MkDir(), "aptly.yaml5")
 	f, _ := os.Create(configname)
@@ -250,6 +371,7 @@ filesystem_publish_endpoints:
         root_dir: /opt/srv/aptly_public
         link_method: hardlink
         verify_method: md5
+jfrog_publish_endpoints: {}
 s3_publish_endpoints:
     test:
         region: us-east-1