docs(xml): fill missing XML doc comments + strip task-tracking refs across src (fixdocs)

Add missing <summary>/<param>/<returns>/<typeparam> tags and switch
interface implementations to <inheritdoc/> across 106 files; strip
project bookkeeping identifiers (Task NN, #05-TNN, PLAN-04, StoreAndForward-0NN)
from shipped code comments while preserving the descriptive rationale.
Comment-only: zero code-logic lines changed; solution builds 0/0.

Claude-Session: https://claude.ai/code/session_01MtdgwpEeCUn6cUA5f1LMPj

src/ZB.MOM.WW.ScadaBridge.NotificationService/OAuth2TokenService.cs

@@ -86,13 +86,13 @@ public class OAuth2TokenService
 
             var client = _httpClientFactory.CreateClient("OAuth2");
 
-            // Authority: null → today's hardcoded M365 endpoint; otherwise the stored
+            // Authority: null → today's hardcoded Microsoft 365 endpoint; otherwise the stored
             // template with an optional {tenant} placeholder resolved from the credential.
             var tokenUrl = authority == null
                 ? $"https://login.microsoftonline.com/{tenantId}/oauth2/v2.0/token"
                 : authority.Replace("{tenant}", tenantId);
 
-            // Scope: null → the M365 default.
+            // Scope: null → the Microsoft 365 default.
             var tokenScope = scope ?? "https://outlook.office365.com/.default";
 
             var form = new FormUrlEncodedContent(new Dictionary<string, string>