Changes

Summary

1. merged
2. clarified directory layout;
3. eliminated unused afp_pull_date table; tuned;
4. slightly more compact file;
5. produce build_log_snapshot, based on small prefix into pull_date history;
6. omit parentheses for the sake of SQLite;
7. more snapshot content;
8. more robust;
9. more direct insert_permissive statement, which avoids somewhat fragile nested transactions;
10. tuned signature;
11. simplified: standard toString is SQL.ident;
12. tuned;
13. tuned signature;
14. clarified signature;
15. tuned signature;
16. tuned signature;
17. tuned signature;
18. clarified modules;
19. clarified pull_date tables; support for SQLite snapshot;
20. views for full PostgreSQL database;
21. eliminated redundant type SQL.View; eliminated unused DROP operations;
22. tuned;
23. tuned signature;
24. tuned;