cc0cc8cd89
- Bootstrapper: an ALTER ... ADD INDEX refused up front (e.g. no DDL rights) logs a Warning and lets the bootstrap succeed (the index is optional); a WAL-apply failure remains unobserved, like the TTL ALTER — documented. Integration test (VARCHAR tag => refused ALTER) fails with the catch removed. - Historian.md: a dominant tag can read ~20% slower on long windows (single- threaded index scan vs parallel JIT filter); O3 writes rewrite index files; sample_modified.tag / event.source deliberately not indexed, and why. - CLAUDE.md: the concurrent-HistoryUpdate-delete caveat on the range-first order.