chore: upgrade catch2 3.8.0→3.14.0; fix test ordering issues

catch2 3.14.0 randomizes test execution order by default (3.8.0 ran in
declaration order), exposing pre-existing singleton state issues:

- Add MaxmindDB::disable() to reset GeoIP/GeoASN singletons between tests
- Reset singletons at start of "Geo enablement" test section
- Add IpPort::set_csv_iana_ports() setup to flow test cases that depend
  on port name resolution but didn't load the CSV themselves

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: leoparente

conanfile.py

@@ -7,7 +7,7 @@ class Pktvisor(ConanFile):
     generators = "CMakeToolchain", "CMakeDeps"
 
     def requirements(self):
-        self.requires("catch2/3.8.0")
+        self.requires("catch2/3.14.0")
         self.requires("corrade/2020.06")
         self.requires("cpp-httplib/0.18.3")
         self.requires("docopt.cpp/0.6.3")

src/GeoDB.h

@@ -57,6 +57,15 @@ class MaxmindDB
     ~MaxmindDB();
 
     void enable(const std::string &database_filename, int cache_size = DEFAULT_CACHE_SIZE);
+    void disable()
+    {
+        if (_enabled) {
+            MMDB_close(&_mmdb);
+            _enabled = false;
+        }
+        _lru_geo_cache.reset();
+        _lru_asn_cache.reset();
+    }
     bool enabled() const
     {
         return _enabled;

src/handlers/flow/test_flows.cpp

@@ -156,6 +156,7 @@ TEST_CASE("Parse sflow stream without sampling", "[sflow][flow]")
 
 TEST_CASE("Parse sflow stream with ip filter", "[sflow][flow]")
 {
+    visor::network::IpPort::set_csv_iana_ports("tests/fixtures/pktvisor-port-service-names.csv");
 
     FlowInputStream stream{"sflow-test"};
     stream.config_set("flow_type", "sflow");
@@ -196,6 +197,7 @@ TEST_CASE("Parse sflow stream with ip filter", "[sflow][flow]")
 
 TEST_CASE("Parse sflow stream with device filter", "[sflow][flow]")
 {
+    visor::network::IpPort::set_csv_iana_ports("tests/fixtures/pktvisor-port-service-names.csv");
 
     FlowInputStream stream{"sflow-test"};
     stream.config_set("flow_type", "sflow");
@@ -240,6 +242,7 @@ TEST_CASE("Parse sflow stream with device filter", "[sflow][flow]")
 
 TEST_CASE("Parse sflow stream with port filter", "[sflow][flow]")
 {
+    visor::network::IpPort::set_csv_iana_ports("tests/fixtures/pktvisor-port-service-names.csv");
 
     FlowInputStream stream{"sflow-test"};
     stream.config_set("flow_type", "sflow");

src/tests/test_geoip.cpp

@@ -13,6 +13,8 @@ TEST_CASE("GeoIP", "[geoip]")
 {
     SECTION("Geo enablement")
     {
+        visor::geo::GeoIP().disable();
+        visor::geo::GeoASN().disable();
         CHECK(!visor::geo::GeoIP().enabled());
         CHECK_THROWS(visor::geo::GeoIP().enable("nonexistent.mmdb"));
         CHECK(!visor::geo::GeoIP().enabled());