Add scan queue execution and listing endpoint.

Run scans in background with progress/status updates and store scan metrics in memory or PostgreSQL.

Made-with: Cursor

internal/store/sql/001_init.sql

@@ -0,0 +1,19 @@
+create table if not exists scan_jobs (
+  id text primary key,
+  name text not null,
+  status text not null check (status in ('queued','running','done','failed','canceled')),
+  cidrs jsonb not null,
+  exclude_ips jsonb not null default '[]'::jsonb,
+  options jsonb not null,
+  progress int not null default 0,
+  stats jsonb not null default '{}'::jsonb,
+  snmp_credentials_id text null,
+  created_at timestamptz not null default now(),
+  started_at timestamptz null,
+  finished_at timestamptz null
+);
+
+create index if not exists idx_scan_jobs_created_at on scan_jobs (created_at desc);
+
+alter table scan_jobs add column if not exists progress int not null default 0;
+alter table scan_jobs add column if not exists stats jsonb not null default '{}'::jsonb;