proxy: use wherever http.Client is, update mautrix

Added a new common.ConfigurableTransport interface which mediabrowser,
ombi, jellyseer, discord, telegram and matrix (i.e.
ThirdPartService/ContactMethodLinker) now all implement. proxies are
bound to them in main.go, Email is still a special case (but from the
previous commit, mailgun does use the proxy).

mautrix/go has been updated, and context.TODO()s stuck everywhere since
I still don't really comprehend why I should use them (FIXME literally).

ombi/go.mod

@@ -2,6 +2,8 @@ module github.com/hrfee/jfa-go/ombi
 
 replace github.com/hrfee/jfa-go/common => ../common
 
-go 1.15
+go 1.22.4
 
-require github.com/hrfee/jfa-go/common v0.0.0-20240805130902-86c37fb4237b // indirect
+require github.com/hrfee/jfa-go/common v0.0.0-20240806200606-6308db495a0a
+
+require github.com/hrfee/jfa-go/logmessages v0.0.0-20240806200606-6308db495a0a // indirect

ombi/go.sum

@@ -0,0 +1,2 @@
+github.com/hrfee/jfa-go/logmessages v0.0.0-20240806200606-6308db495a0a h1:qbXZgCqb9eaPSJfLEXczQD2lxTv6jb6silMPIWW9j6o=
+github.com/hrfee/jfa-go/logmessages v0.0.0-20240806200606-6308db495a0a/go.mod h1:c5HKkLayo0GrEUDlJwT12b67BL9cdPjP271Xlv/KDRQ=

ombi/ombi.go

@@ -46,6 +46,11 @@ func NewOmbi(server, key string, timeoutHandler co.TimeoutHandler) *Ombi {
 	}
 }
 
+// SetTransport sets the http.Transport to use for requests. Can be used to set a proxy.
+func (ombi *Ombi) SetTransport(t *http.Transport) {
+	ombi.httpClient.Transport = t
+}
+
 // does a GET and returns the response as a string.
 func (ombi *Ombi) getJSON(url string, params map[string]string) (string, int, error) {
 	if ombi.key == "" {