refactor(export): implement best-effort partial success for BulkExportTool (QUAL1)

test(bug5): add comprehensive tests for tag assignment in task creation (BUG5)

fix(task-creation): implement fail-fast pattern for tag assignment errors (BUG5)

docs(backlog): reconstruct complete feature history from v1.0-v1.3.1

feat(backlog): add FEAT1 for incremental tag operations

refactor(backlog): apply backlog-methodology format standards

docs(backlog): mark BUG3 and BUG4 as completed

perf(recurring): use availableTasks() when activeOnly=true (BUG3 partial)

fix(tasks): handle project and tags in CREATE_TASK_SCRIPT (BUG4)

docs(backlog): add BUG4 - task creation ignores project and tags

docs(backlog): mark BUG1 as completed

fix(projects): normalize project status to remove ' status' suffix

docs(backlog): migrate to planning/ directory and update BUG3 progress

perf(analytics): use availableTasks for better performance

perf(list_tags): make usage statistics optional to prevent timeout