fix(core): gate v2 edit tools by model - #34558

Summary

• make V2 tool materialization aware of the selected model id
• mimic V1 edit-tool selection: patch-oriented GPT models get apply_patch, other models get edit/write
• add registry coverage for gpt-5, gpt-4o, gpt-oss, and claude cases

Testing

• git diff --check
• attempted bun test test/session-runner-tool-registry.test.ts from packages/core, but the fresh worktree had no installed dependencies (Cannot find package effect)