Add option to limit example len (#1145)

Do not save OAS example response if it is over the limit.
SpecGen.MaxExampleLen is measured in bytes.
Limit=0 means "don't record any examples", while limit=-1 means "record all".

Limit is configured via the config file / --set: --set oas.max-example-len=100.
The default is 10KB.

This PR breaks the previous config. Moved oas bool (enable/disable OAS) to oas.enable.
Users who wish to disable OAS (or to explicitly enable it) should now to so with --set oas.enable=false instead of --set oas=false.

Co-authored-by: Nimrod Gilboa Markevich <nimrod@up9.com>
Co-authored-by: Nimrod Gilboa Markevich <59927337+nimrod-up9@users.noreply.github.com>

shared/models.go

@@ -32,6 +32,11 @@ type Resources struct {
 	MemoryRequests string `yaml:"memory-requests" default:"50Mi"`
 }
 
+type OASConfig struct {
+	Enable        bool `yaml:"enabled" default:"true"`
+	MaxExampleLen int  `yaml:"max-example-len" default:"10240"`
+}
+
 type MizuAgentConfig struct {
 	MaxDBSizeBytes         int64         `json:"maxDBSizeBytes"`
 	InsertionFilter        string        `json:"insertionFilter"`
@@ -42,7 +47,7 @@ type MizuAgentConfig struct {
 	MizuResourcesNamespace string        `json:"mizuResourceNamespace"`
 	AgentDatabasePath      string        `json:"agentDatabasePath"`
 	ServiceMap             bool          `json:"serviceMap"`
-	OAS                    bool          `json:"oas"`
+	OAS                    OASConfig     `json:"oas"`
 	Telemetry              bool          `json:"telemetry"`
 }