feat(cli+templateengine+deploymanager): resolve follow-ups #4/#5/#6/#8 — CLI ergonomics + structured deploy validation error

Closes the four remaining items in the 2026-06-24 template-inheritance/CLI
follow-up tracker.

#4 — CLI `instance set-bindings` can now set DataSourceReferenceOverride.
  `--bindings` accepts an optional 3rd element per entry:
  [attributeName, dataConnectionId, dataSourceReferenceOverride]. A string
  sets the override; a JSON null or an omitted 3rd element leaves it unset
  (template default). TryParseBindings accepts 2- or 3-element entries and
  rejects a non-string/non-null 3rd element or 4+ elements with a clean
  error. Previously the CLI sent the override as null and silently wiped any
  existing one (only a raw POST /management could set it).

#5 — `template update` is partial, not full-replace (fixed server-side so all
  clients benefit). UpdateTemplateAsync now uses leave-unchanged semantics:
  a null description keeps the stored value (pass "" to clear); a null
  parentTemplateId keeps the existing parent. Parent stays immutable — a
  non-null differing value is still rejected — but omitting --parent-id is
  now a no-op instead of failing every derived-template update.

#6 — compact `template list`/`get` table output + `--detail`. Table output is
  now id/name/description/parent/derived + member counts (#attrs/#alarms/
  #scripts/#comps/#nativeAlarms) via TemplateTableProjection, fed through a
  new optional tableProjector seam on CommandHelpers. `--detail` restores the
  full dump. JSON output is left untouched (always full) so machine consumers
  are unaffected — the projector only runs on the table path.

#8 — structured deploy-time validation error. New ValidationResult.SummarizeErrors()
  (Commons) returns a grouped, capped summary: leading total count, one line
  per ValidationCategory, and a per-module rollup (canonical name up to its
  last dot) with counts + "... and N more module(s)" caps. DeploymentService
  uses it for the "Pre-deployment validation failed" message and logs the full
  per-entry list via LogWarning. Replaces the flat semicolon-joined dump that
  became a wall of text for instances with 50-194 unbound attributes.

Tests: +8 Commons (SummarizeErrors), +8 CLI (4 binding 3-element / 4 table
projection), +2 net TemplateEngine (partial-update). Affected suites green:
Commons 587, CLI 341, TemplateEngine 447, DeploymentManager 101,
ManagementService 230, CentralUI 866; full solution builds 0/0.

Docs: Component-DeploymentManager.md "Validation Error Reporting"; CLI README
(set-bindings 3-element form, template update leave-unchanged, list/get
--detail); UpdateTemplateCommand doc; known-issues tracker #4/#5/#6/#8 resolved
(all 8 items now closed).

src/ZB.MOM.WW.ScadaBridge.CLI/Commands/TemplateCommands.cs

@@ -54,11 +54,19 @@ public static class TemplateCommands
 
     private static Command BuildList(Option<string> urlOption, Option<string> formatOption, Option<string> usernameOption, Option<string> passwordOption)
     {
-        var cmd = new Command("list") { Description = "List all templates" };
+        var detailOption = new Option<bool>("--detail")
+        {
+            Description = "Include full template definitions (all attributes/alarms/scripts) in table output. "
+                + "Without it, table output is a compact summary (counts only). JSON output is always full."
+        };
+        var cmd = new Command("list") { Description = "List all templates (compact table summary; use --detail for the full dump)" };
+        cmd.Add(detailOption);
         cmd.SetAction(async (ParseResult result) =>
         {
+            var detail = result.GetValue(detailOption);
             return await CommandHelpers.ExecuteCommandAsync(
-                result, urlOption, formatOption, usernameOption, passwordOption, new ListTemplatesCommand());
+                result, urlOption, formatOption, usernameOption, passwordOption, new ListTemplatesCommand(),
+                tableProjector: detail ? null : TemplateTableProjection.ProjectSummary);
         });
         return cmd;
     }
@@ -66,13 +74,21 @@ public static class TemplateCommands
     private static Command BuildGet(Option<string> urlOption, Option<string> formatOption, Option<string> usernameOption, Option<string> passwordOption)
     {
         var idOption = new Option<int>("--id") { Description = "Template ID", Required = true };
-        var cmd = new Command("get") { Description = "Get a template by ID" };
+        var detailOption = new Option<bool>("--detail")
+        {
+            Description = "Include full template definitions (all attributes/alarms/scripts) in table output. "
+                + "Without it, table output is a compact summary (counts only). JSON output is always full."
+        };
+        var cmd = new Command("get") { Description = "Get a template by ID (compact table summary; use --detail for the full dump)" };
         cmd.Add(idOption);
+        cmd.Add(detailOption);
         cmd.SetAction(async (ParseResult result) =>
         {
             var id = result.GetValue(idOption);
+            var detail = result.GetValue(detailOption);
             return await CommandHelpers.ExecuteCommandAsync(
-                result, urlOption, formatOption, usernameOption, passwordOption, new GetTemplateCommand(id));
+                result, urlOption, formatOption, usernameOption, passwordOption, new GetTemplateCommand(id),
+                tableProjector: detail ? null : TemplateTableProjection.ProjectSummary);
         });
         return cmd;
     }
@@ -103,10 +119,10 @@ public static class TemplateCommands
     {
         var idOption = new Option<int>("--id") { Description = "Template ID", Required = true };
         var nameOption = new Option<string>("--name") { Description = "Template name", Required = true };
-        var descOption = new Option<string?>("--description") { Description = "Template description" };
-        var parentOption = new Option<int?>("--parent-id") { Description = "Parent template ID" };
+        var descOption = new Option<string?>("--description") { Description = "Template description. Omit to leave unchanged; pass an empty string (\"\") to clear it." };
+        var parentOption = new Option<int?>("--parent-id") { Description = "Parent template ID. Immutable after creation; omit to leave unchanged." };
 
-        var cmd = new Command("update") { Description = "Update a template" };
+        var cmd = new Command("update") { Description = "Update a template (omitted optional fields are left unchanged)" };
         cmd.Add(idOption);
         cmd.Add(nameOption);
         cmd.Add(descOption);