HTTP Triggers hookup (#1086)

* Initial suypport for invoking tiggers

* dupe method

* tighten server constraints

* runner tests not working yet

* basic route tests passing

* post rebase fixes

* add hybrid support for trigger invoke and tests

* consoloidate all hybrid evil into one place

* cleanup and make triggers unique by source

* fix oops with Agent

* linting

* review fixes

api/models/call.go

@@ -149,6 +149,12 @@ type Call struct {
 
 	// App this call belongs to.
 	AppID string `json:"app_id" db:"app_id"`
+
+	// Trigger this call belongs to.
+	TriggerID string `json:"trigger_id" db:"trigger_id"`
+
+	// Fn this call belongs to.
+	FnID string `json:"fn_id" db:"fn_id"`
 }
 
 type CallFilter struct {