fix: update Claude Agent SDK to 0.3.300 (#1355)

Updates `@anthropic-ai/claude-agent-sdk` from 0.3.296 to 0.3.300 (parity
with Claude Code v2.1.300), and `@anthropic-ai/sdk` from 0.133.0 to
0.134.0.

No code changes needed. The new types are an optional `property_order`
on elicitation requests, `nextFireAt` on the CronCreate/CronList
outputs, and `owned` on Artifact outputs. We don't need any of them.

Fixes picked up that affect this agent:
- `importSessionToStore` (used for session forks) no longer skips
transcript rows containing U+2028/U+2029 on Node 24.
- Resuming an SDK session after a compaction no longer loses the recent
messages or the compaction summary in some cases.
- Background subagents in auto mode no longer send their final report
twice or merge it into another turn.
- Queued content-block prompts merged into one turn are now separated by
a line break.
- `ScheduleWakeup` now fires while a background task is running.

Behaviour change: `MAX_THINKING_TOKENS=0` (sent as `thinking: { type:
"disabled" }`) now runs adaptive thinking on models that can't turn
thinking off.

`npm run build`, `npm run check` and `npm run test:run` all pass.

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

---------

Co-authored-by: Claude Opus 5.5 <noreply@anthropic.com>

package.json

@@ -66,12 +66,12 @@
   },
   "dependencies": {
     "@agentclientprotocol/sdk": "1.8.0",
-    "@anthropic-ai/claude-agent-sdk": "0.3.296",
+    "@anthropic-ai/claude-agent-sdk": "0.3.300",
     "diff": "9.0.0",
     "zod": "4.6.7"
   },
   "devDependencies": {
-    "@anthropic-ai/sdk": "0.133.0",
+    "@anthropic-ai/sdk": "0.134.0",
     "@eslint/js": "10.0.1",
     "@tsconfig/node22": "22.0.6",
     "@types/node": "26.6.5",