[chore] improved router logging, recovery and error handling (#705)

* move panic recovery to logging middleware, improve logging + panic recovery logic

Signed-off-by: kim <grufwub@gmail.com>

* remove dead code

Signed-off-by: kim <grufwub@gmail.com>

* remove skip paths code

Signed-off-by: kim <grufwub@gmail.com>

* re-enable log quoting

Signed-off-by: kim <grufwub@gmail.com>

* use human-friendly bytesize in logging body size

Signed-off-by: kim <grufwub@gmail.com>

* only disable quoting in debug builds

Signed-off-by: kim <grufwub@gmail.com>

* use logrus level instead of debug.DEBUG() to enable/disable quoting

Signed-off-by: kim <grufwub@gmail.com>

* shutup linter

Signed-off-by: kim <grufwub@gmail.com>

* fix instance tests

Signed-off-by: kim <grufwub@gmail.com>

* fix gin test contexts created with missing engine HTML renderer

Signed-off-by: kim <grufwub@gmail.com>

* add note regarding not logging query parameters

Signed-off-by: kim <grufwub@gmail.com>

* better explain 'DisableQuoting' logic

Signed-off-by: kim <grufwub@gmail.com>

* add license text

Signed-off-by: kim <grufwub@gmail.com>

internal/api/client/admin/admin_test.go

@@ -100,7 +100,7 @@ func (suite *AdminStandardTestSuite) TearDownTest() {
 }
 
 func (suite *AdminStandardTestSuite) newContext(recorder *httptest.ResponseRecorder, requestMethod string, requestBody []byte, requestPath string, bodyContentType string) *gin.Context {
-	ctx, _ := gin.CreateTestContext(recorder)
+	ctx, _ := testrig.CreateGinTestContext(recorder, nil)
 
 	ctx.Set(oauth.SessionAuthorizedAccount, suite.testAccounts["admin_account"])
 	ctx.Set(oauth.SessionAuthorizedToken, oauth.DBTokenToToken(suite.testTokens["admin_account"]))