fix: Read database configuration properly when = is present in value

Resolves #2120

test/io/configs/expected/no-defaults-with-db.config

@@ -15,8 +15,8 @@ db-uri = "<REPLACED_WITH_DB_URI>"
 db-use-legacy-gucs = false
 jwt-aud = "https://example.org"
 jwt-role-claim-key = ".\"a\".\"role\""
-jwt-secret = "OVERRIDEREALLYREALLYREALLYREALLYVERYSAFE"
-jwt-secret-is-base64 = true
+jwt-secret = "OVERRIDE=REALLY=REALLY=REALLY=REALLY=VERY=SAFE"
+jwt-secret-is-base64 = false
 log-level = "info"
 openapi-mode = "ignore-privileges"
 openapi-server-proxy-uri = "https://example.org/api"