refactor: remove reconciliation system and all related code, tasks, and docs

Fix: Correct expense relationship usage and add missing real-time reconciliation on ticket completion

fix: add complete status-history coverage, set started_at correctly, and harden dedup_key + location tracking

fix: replace string-based joinedload with class-bound attributes to restore completion-checklist relationship loading

fix: correctly detect uploaded checklist photos by parsing description and eager-loading images

Add dedicated PUT /completion-data endpoint for partial updates to ticket completion data

feat(ticket-completion): allow incremental photo uploads and enforce full validation only at completion

Fix dependency imports: correct get_db and get_current_user imports to use app.api.deps

complete services