docs(joinir): Phase 86 SSOT 追記完了 + Phase 88 準備

Phase 86 SSOT 追記（P0 完了）:
- 10-Now.md: carrier_init_builder / error_tags 確立を追記
- CURRENT_TASK.md: P0→P1 繰り上げ、Done 節追加

Phase 88 準備:
- nyash_kernel/lib.rs: AOT 実行器で Ring0Context 初期化
- nyash.toml: プラグインパス正規化（plugins/...）
- auto_detect.conf: integration タイムアウト 120秒に延長

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

nyash.toml

@@ -668,7 +668,7 @@ fini = { method_id = 4294967295 }
 # ArrayBox Plugin (Core Box)
 [libraries."libnyash_array_plugin.so"]
 boxes = ["ArrayBox"]
-path = "target/release/libnyash_array_plugin.so"
+path = "plugins/nyash-array-plugin/libnyash_array_plugin.so"
 
 [libraries."libnyash_array_plugin.so".ArrayBox]
 type_id = 5
@@ -688,7 +688,7 @@ fini = { method_id = 4294967295 }
 # MapBox Plugin (Core Box)
 [libraries."libnyash_map_plugin.so"]
 boxes = ["MapBox"]
-path = "target/release/libnyash_map_plugin.so"
+path = "plugins/nyash-map-plugin/libnyash_map_plugin.so"
 
 [libraries."libnyash_map_plugin.so".MapBox]
 type_id = 6
@@ -708,7 +708,7 @@ fini = { method_id = 4294967295 }
 # ConsoleBox Plugin (Core Box)
 [libraries."libnyash_console_plugin.so"]
 boxes = ["ConsoleBox"]
-path = "target/release/libnyash_console_plugin.so"
+path = "plugins/nyash-console-plugin/libnyash_console_plugin.so"
 
 [libraries."libnyash_console_plugin.so".ConsoleBox]
 type_id = 7