fix(agent): rebuild resume transcripts from ACP top-level tool fields

[tatoalo]

Problem

When a cloud run resumes into a successor run, the agent server rebuilds the prior Claude session JSONL from the run's S3 event log (hydrateSessionJsonl). The rebuild read toolCallId/toolInput/toolResponse from _meta.claudeCode, but in the logs agent-server actually persists, ACP puts toolCallId, rawInput, and rawOutput on the update object itself. _meta.claudeCode only reliably carries toolName.

Result: every tool call was silently dropped from the rebuilt transcript. A real 30-minute run with 7,522 log entries and 97 tool calls hydrated to a 4-line transcript (the prompt plus ~2KB of assistant prose), so the resumed agent greeted the user, found a clean tree, and re-implemented the whole task from scratch.

Changes

• rebuildConversation now reads toolCallId from the update (falling back to meta for older logs), takes input from rawInput (skipping the empty {} the opening tool_call ships so it can't clobber streamed input), and results from rawOutput or meta.toolResponse
• individual tool payloads are capped at 10k chars so one giant Write input or test dump can't dominate the resume budget
• selectRecentTurns gets a fallback for the shape every single-prompt run produces (one user turn plus one giant assistant turn): when the final turn alone exceeds the token budget it now sheds the oldest tool calls until it fits, instead of selecting zero turns and writing an empty transcript

[github-actions]

React Doctor found no issues in the changed files. 🎉

_{Reviewed by React Doctor for commit 57ffb69.}

[greptile-apps]

_{Reviews (1): Last reviewed commit: "fix(agent): rebuild resume transcripts f..." | Re-trigger Greptile}

[github-actions]

Fix correctly extends the SessionUpdate interface to read ACP top-level fields and adds a robust fallback for oversized single-turn transcripts. The greptile bot's object-truncation concern was genuinely addressed, and the new tests cover both the ACP shape and the truncation/fallback behaviors.

[greptile-apps]

_{Reviews (2): Last reviewed commit: "fix(agent): keep truncated tool inputs a..." | Re-trigger Greptile}