test: prune redundant cases and add high-risk coverage across crates (#4208)

Remove or consolidate 57 test cases that cannot catch regressions
(literal-constant asserts, construct-then-assert, derived-serde
round-trips, near-duplicate env/getter matrices) in common, config,
iam, madmin, and object-capacity, keeping all wire-format and
error-path guards. Add 13 tests for previously uncovered high-risk
behavior: filemeta version-sort determinism and merge resilience to
garbage headers, zip extraction path-traversal rejection and exact
limit boundaries, JWT tampered-signature rejection, and the bytes
variant of dual-key (rustfs/minio) metadata fallback and precedence.

Test-only change; no production code touched.

Co-authored-by: Claude Fable 5 <noreply@anthropic.com>

crates/config/src/constants/app.rs

@@ -325,85 +325,6 @@ pub const MI_B: usize = 1024 * KI_B;
 mod tests {
     use super::*;
 
-    #[test]
-    fn test_app_basic_constants() {
-        // Test application basic constants
-        assert_eq!(APP_NAME, "RustFS");
-        assert!(!APP_NAME.contains(' '), "App name should not contain spaces");
-
-        assert_eq!(VERSION, "1.0.0");
-
-        assert_eq!(SERVICE_VERSION, "1.0.0");
-        assert_eq!(VERSION, SERVICE_VERSION, "Version and service version should be consistent");
-    }
-
-    #[test]
-    fn test_logging_constants() {
-        // Test logging related constants
-        assert_eq!(DEFAULT_LOG_LEVEL, "error");
-        assert!(
-            ["trace", "debug", "info", "warn", "error"].contains(&DEFAULT_LOG_LEVEL),
-            "Log level should be a valid tracing level"
-        );
-
-        assert_eq!(SAMPLE_RATIO, 1.0);
-
-        assert_eq!(METER_INTERVAL, 30);
-    }
-
-    #[test]
-    fn test_environment_constants() {
-        // Test environment related constants
-        assert_eq!(ENVIRONMENT, "production");
-        assert_eq!(ENV_RUSTFS_LICENSE_PUBLIC_KEY, "RUSTFS_LICENSE_PUBLIC_KEY");
-        assert!(
-            ["development", "staging", "production", "test"].contains(&ENVIRONMENT),
-            "Environment should be a standard environment name"
-        );
-    }
-
-    #[test]
-    fn test_file_path_constants() {
-        assert_eq!(RUSTFS_TLS_KEY, "rustfs_key.pem");
-        assert!(RUSTFS_TLS_KEY.ends_with(".pem"), "TLS key should be PEM format");
-
-        assert_eq!(RUSTFS_TLS_CERT, "rustfs_cert.pem");
-        assert!(RUSTFS_TLS_CERT.ends_with(".pem"), "TLS cert should be PEM format");
-    }
-
-    #[test]
-    fn test_port_constants() {
-        // Test port related constants
-        assert_eq!(DEFAULT_PORT, 9000);
-
-        assert_eq!(DEFAULT_CONSOLE_PORT, 9001);
-
-        assert_ne!(DEFAULT_PORT, DEFAULT_CONSOLE_PORT, "Main port and console port should be different");
-    }
-
-    #[test]
-    fn test_address_constants() {
-        // Test address related constants
-        assert_eq!(DEFAULT_ADDRESS, ":9000");
-        assert!(DEFAULT_ADDRESS.starts_with(':'), "Address should start with colon");
-        assert!(
-            DEFAULT_ADDRESS.contains(&DEFAULT_PORT.to_string()),
-            "Address should contain the default port"
-        );
-
-        assert_eq!(DEFAULT_CONSOLE_ADDRESS, ":9001");
-        assert!(DEFAULT_CONSOLE_ADDRESS.starts_with(':'), "Console address should start with colon");
-        assert!(
-            DEFAULT_CONSOLE_ADDRESS.contains(&DEFAULT_CONSOLE_PORT.to_string()),
-            "Console address should contain the console port"
-        );
-
-        assert_ne!(
-            DEFAULT_ADDRESS, DEFAULT_CONSOLE_ADDRESS,
-            "Main address and console address should be different"
-        );
-    }
-
     #[test]
     fn test_const_str_concat_functionality() {
         // Test const_str::concat macro functionality