Fix XML documentation spelling, grammar, and correctness issues across SDK

[Copilot]

Fixes ~67 XML doc comment issues in src/ ranging from typos to incorrect see cref targets, plus one non-doc string concatenation bug. All fixes are applied.

Issues Fixed

Wrong see cref references

• McpServerPrompt.cs, McpServerTool.cs, McpServerResource.cs: Multiple overloads referenced Delegate instead of MethodInfo, and AIFunction instead of the correct McpServer* type in <param> and <returns> tags
• ElicitRequestParams.cs: Converter summary referenced ResourceContents instead of PrimitiveSchemaDefinition; orphaned text wrapped in <remarks>
• ListRootsRequestParams.cs: Referenced RequestMethods.ResourcesTemplatesList instead of RootsList
• IClientTransport.cs: Tautological McpClient reference changed to McpClient.CreateAsync
• CompletionsCapability.cs, LoggingCapability.cs: Said "sampling capabilities" (copy-paste from SamplingCapability)

Wrong actor/direction descriptions

• McpClientHandlers.cs: Said "behavior of the MCP server" — changed to "client"; said client sends roots/list — server sends it
• RootsListChangedNotificationParams.cs: Said issued by servers — issued by clients
• McpSession.Methods.cs: Said "to the server" — changed to "to the connected session" (base class for both client and server)

Spelling and typos

• setialization → initialization, sor → or, advertizes/advertize → advertises/advertise, templates's → template's, members's → member's, addition → additional, circument → circumvent, dieing → dying

Grammar

• an large → a large, An primitive → A primitive, missing verbs ("notification be issued" → "can be issued"), missing words ("asking it initialize" → "asking it to initialize"), missing articles ("The name of notification" → "The name of the notification"), an specification → a specification

Malformed XML

• <see false="false"/> → <see langword="false"/>, <p> → <para>, duplicate <returns> tags removed, orphaned text wrapped in <remarks>, stray "/> fragment removed, empty <exception> tag removed, missing period added

Copy-paste errors

• McpServerResource.cs: ProtocolResource remarks incorrectly described ProtocolResourceTemplate
• McpServerBuilderExtensions.cs: call_prompt → prompts/get; "prompts should be sourced" → "resources should be sourced" on WithResources method
• McpAuthenticationExtensions.cs: "authorization" → "authentication" (×3)
• ProtectedResourceMetadata.cs: Simplified summary per reviewer feedback

Minor

• Double spaces, missing articles, missing commas, inconsistent "Streaming" vs "Streamable" terminology, Messages → messages, Urls → URLs, wrong <param name> in EquatableArray, duplicate <exception> tag removed

Non-doc fix

• McpServerBuilderExtensions.cs: Missing space in string concatenation for error messages (×3) — produced "metadataand" at runtime

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[stephentoub]

No code changes were made — this PR is the audit report only, as the session timed out before fixes could be applied.

@copilot please continue

[Copilot]

No code changes were made — this PR is the audit report only, as the session timed out before fixes could be applied.

@copilot please continue

Applied all 67 fixes from the audit in 81dadfd. This covers wrong see cref references, actor/direction errors, spelling/grammar typos, malformed XML tags, copy-paste errors, and string concatenation issues. Build passes with 0 warnings and all tests pass.