fix(sarif): point informationUri at git.trevon.dev

fold lives only on git.trevon.dev, but every SARIF report advertised
https://github.com/trvon/fold as the tool's information URI, so code
scanning UIs and SARIF viewers linked readers to a repository fold no
longer uses. The driver now points at https://git.trevon.dev/trevon/fold.

test_scan_e2e asserts the URI; it failed before this change.

src/report/sarif.cpp

@@ -411,7 +411,7 @@ void writeFilteredSarif(std::ostream& out, const std::vector<Finding>& findings,
          {
              {"name", "fold"},
              {"version", foldVersion()},
-             {"informationUri", "https://github.com/trvon/fold"},
+             {"informationUri", "https://git.trevon.dev/trevon/fold"},
              {"properties",
               {
                   {"z3_version", Z3_get_full_version()},

tests/integration/test_scan_e2e.cpp

@@ -101,6 +101,8 @@ TEST_CASE("SARIF keeps stable rule metadata for structural findings", "[sarif]")
     const auto& driver = sarif["runs"][0]["tool"]["driver"];
     const auto& results = sarif["runs"][0]["results"];
 
+    // fold lives only on git.trevon.dev; SARIF consumers follow this link.
+    REQUIRE(driver["informationUri"] == "https://git.trevon.dev/trevon/fold");
     REQUIRE(results[0]["ruleId"] == "fold.clone");
     REQUIRE(results[0]["properties"]["backend"] == "clang");
     REQUIRE(results[1]["ruleId"] == "fold.high-complexity");