fix(agent/service): retry jitter, tool executor ordering, curl SSRF, grep/JSON
- agent/client: full jitter backoff (random(0, base_ms)) instead of equal jitter
- agent/tool/executor: fix buffer_unordered ordering mismatch with
HashMap-by-index approach for concurrent tool execution
- agent/chat: AiChunkType emit fixes, is_retryable_tool_error refinements,
process_react uses request.max_tool_depth
- agent/chat/context: fix Function message sender_name field
- file_tools/curl: shared reqwest::Client via OnceLock, manual redirect
following with per-hop SSRF validation, blocked sensitive headers
- file_tools/grep: fix case-insensitive glob matching, segment consumption
- file_tools/json: bracket notation support, remove .vscodeignore from JSONC
- git_tools: git_diff_stats resolve base/head independently,
DiffFileOut old_file.path for Deleted, reflog offset_minutes
- git/repo: create_commit read parent tree into index, bare repo init
- project_tools/repos: branch/path validation, .git/ prefix check
- service/agent: tokent integration, billing, pr_summary, code_review fixes
f7e087e066