Closes#1076, #1338.
Fix A — tenant backup aborted with SQLSTATE 42703 "column id does not
exist" because exportQuery() hardcoded ORDER BY id. Several tenant-scoped
tables have composite PKs and no id column. Add a TableDef.OrderBy field,
honor it in exportQuery(), and set it for every id-less registry table:
config_secrets, agent_team_members, tenant_hook_budget, system_configs,
builtin_tool_tenant_configs, skill_tenant_configs, user_agent_profiles.
Fix B — hooks, tenant_hook_budget and webhook config were missing from
the backup registry, silently dropping their data on backup/restore. Add
hooks, tenant_hook_budget, webhooks (preserve) plus the hook_agents junction
(via ParentJoin through hooks, composite PK), and mark hook_executions and
webhook_calls as ephemeral in the skipped list.
Fix C — restoring on a fresh server failed with "N active DB connection(s)
detected" because the gateway's own pool connections were counted as active
clients. Tag pool connections with application_name='goclaw' (pg.OpenDB) and
exclude them in CheckActiveConnections; genuine external clients still block.
Adds unit + integration regression tests, including an export-over-every-
registered-table test that surfaced the additional id-less tables.
thotam