feat(electron): report custom URL protocol registrations

Expose static Electron protocol call facts through the shared application graph and existing CLI/MCP Evidence views. Preserve canonical case-insensitive scheme identity, original spellings, exact source provenance and explicit unknowns; keep registration success and runtime routing unproven.

Integration fixes also enforce module-only privileged API ownership, reuse the shared finding-key owner, and align the owning type documentation with the Evidence semantics. Validation and bounded real Obsidian CLI/MCP measurements are recorded in the PR.

Co-authored-by: UnknownHacker1 <35694178+UnknownHacker1@users.noreply.github.com>
Co-authored-by: gensokyo-dev <342580529+gensokyo-dev@users.noreply.github.com>

src/contracts/javascript/javascriptExportShapeComparisonExample.ts

@@ -64,6 +64,7 @@ const summary = {
   resolved_utility_entrypoints: 0,
   native_addon_bindings: 0,
   resolved_native_addon_bindings: 0,
+  protocol_registrations: 0,
 };
 const statistics = {
   relevant_files: 1,