chore: add mise tasks for data exploration and database management

[zawakin]

Summary

• Add db:* tasks (init, update, rebuild, info, doctor) for database management
• Add sessions / session tasks for session browsing with --all-worktrees
• Add lab:stats and lab:export tasks, update lab:grep description
• Add lab:raw:* tasks (ls, cat, latest, fields, diff) for raw Claude Code log exploration
• Add watch and projects convenience tasks

New tasks

Task	Description
db:init	Initialize workspace
db:update	Scan for new sessions
db:rebuild	Clear and rebuild index
db:info	Show DB location and stats
db:doctor	Report parsing errors
sessions	List sessions across worktrees
session	Show session analysis
lab:stats	Tool usage statistics
lab:export	Export session data
lab:raw:ls	List raw log files for current project
lab:raw:cat	View raw JSONL by session ID prefix
lab:raw:latest	Show latest session's raw records
lab:raw:fields	Extract JSON field names by record type
lab:raw:diff	Compare normalized vs raw data
watch	Real-time TUI dashboard
projects	List indexed projects

Notes

• lab:raw:* tasks use shell scripts with jq — no Rust code changes needed
• Path derivation matches Claude Code's encoding: replace(['/', '.'], "-") with leading -
• lab:raw:cat and lab:raw:latest use head | jq instead of doctor inspect (workaround for pre-existing clap --format name collision bug)

Test plan

• mise tasks — all 37 tasks listed
• mise run lab:raw:ls — lists log files
• mise run lab:raw:latest -- 3 — shows 3 raw records
• mise run lab:raw:cat -- <prefix> 2 — resolves session by prefix
• mise run lab:raw:fields — groups fields by record type
• mise run lab:raw:diff -- 'Read' 1 — shows raw AgentEvent
• mise run sessions -- --limit 3 — lists sessions
• mise run db:info — shows DB stats

🤖 Generated with Claude Code