feat: browser access (allowed_origins, CORS with Private Network Access), job cancel, Tomie/Unity adapters, benchmark

Includes earlier uncommitted work: Tomie and Unity adapters, benchmark, structured output, call metrics.

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>

tomie.example.json

@@ -0,0 +1,11 @@
+{
+  "game": "D:/Torrents/Pgames/Tomie_Wants_to_Get_Married_Expansion-v1.3801-Win",
+  "api_base": "http://127.0.0.1:8787",
+  "project_file": "examples/tomie_project.json",
+  "output": "data/tomie/patches",
+  "batch_size": 10,
+  "full_output": "data/tomie/full-translation",
+  "full_part_size": 400,
+  "full_batch_size": 20,
+  "full_max_batch_chars": 2000
+}