fix(discovery): use contract prerequisites and provider effects

src/contracts/il2cpp/il2cppToolContracts.ts

@@ -14,6 +14,7 @@ export const IL2CPP_TOOL_CONTRACTS = [
     name: "inspect_il2cpp_metadata",
     ...toolContractMetadata("inspect_il2cpp_metadata"),
     kind: "artifact-provider",
+    requiresActiveTarget: true,
     description:
       "Inspect local Unity IL2CPP metadata (24/27/29/31/39), optionally linking a caller-selected 64-bit little-endian Mach-O, PE or ELF binary. Static reading only. Default summary retains complete Evidence; use parent_evidence_id with inspect_analysis_view kind il2cpp-metadata for named collections, indices, fields and paging. Parameters accept method_indices; method_addresses accept addresses and states. Stable row indices are scoped to the metadata digest; native pages also identify the binary. Native states distinguish executable code, observed zero slots (no-body), and unknown owners/relocations. Shared addresses preserve all methods. code_gen_modules pages accept image_indices; summaries omit that table. Type names are C#-like; version27 retains indices with unknown names. Unrequested native counts are null. Static-table links are derived; the x86-64 executable-byte fallback is inferred and does not verify instruction boundaries. Input guards:256MiB metadata/1GiB binary;64MiB encoded report; one active inspection. Unsupported layouts, pointer encodings and resource limits have typed reasons. Full Evidence remains available with detail complete. Neither static linking nor structural agreement proves runtime behavior or a same-build pair.",
     inputSchema: inspectIl2cppMetadataInputSchema,