query log batching: one transaction per flush interval, not per query

src/web/handlers/settings.zig

@@ -203,6 +203,7 @@ const LoggingView = struct {
     level: []const u8,
     retention_days: u16,
     query_log_buffer_max: u32,
+    query_log_flush_interval_s: u16,
     hide_domains: bool,
     hide_client_ips: bool,
     output: []const u8,
@@ -263,6 +264,7 @@ pub fn view(cfg: model.Config) View {
             .level = cfg.logging.level.toDb(),
             .retention_days = cfg.logging.retention_days,
             .query_log_buffer_max = cfg.logging.query_log_buffer_max,
+            .query_log_flush_interval_s = cfg.logging.query_log_flush_interval_s,
             .hide_domains = cfg.logging.hide_domains,
             .hide_client_ips = cfg.logging.hide_client_ips,
             .output = cfg.logging.output.toDb(),

src/web/openapi.yaml

@@ -2503,13 +2503,14 @@ components:
               enum: [strip, forward]
         logging:
           type: object
-          required: [level, retention_days, query_log_buffer_max, hide_domains, hide_client_ips, output, file_path, max_size_mb, max_files]
+          required: [level, retention_days, query_log_buffer_max, query_log_flush_interval_s, hide_domains, hide_client_ips, output, file_path, max_size_mb, max_files]
           properties:
             level:
               type: string
               enum: [error, warn, info, debug]
             retention_days: { type: integer }
             query_log_buffer_max: { type: integer }
+            query_log_flush_interval_s: { type: integer }
             hide_domains: { type: boolean }
             hide_client_ips: { type: boolean }
             output:
@@ -2651,6 +2652,7 @@ components:
             level: { type: string }
             retention_days: { type: integer }
             query_log_buffer_max: { type: integer }
+            query_log_flush_interval_s: { type: integer }
             hide_domains: { type: boolean }
             hide_client_ips: { type: boolean }
             output: { type: string }

src/web/web_integration_test.zig

@@ -598,6 +598,7 @@ const SettingsView = struct {
             level: []const u8,
             retention_days: u16,
             query_log_buffer_max: u32,
+            query_log_flush_interval_s: u16,
             hide_domains: bool,
             hide_client_ips: bool,
             output: []const u8,