refactor(core): use canonical provider identifiers (Zoo-Code-Org#1022)

* refactor(core): use canonical provider identifiers

* test(core): tighten canonical provider coverage

* test(core): avoid mutating provider identifiers

* test(core): address canonical identifier review feedback

* chore(lint): update test suppression counts

* test(core): keep existing non-null assertions

Author: WebMad

src/core/task/Task.ts

@@ -54,6 +54,7 @@ import {
 	ConsecutiveMistakeError,
 	MAX_MCP_TOOLS_THRESHOLD,
 	countEnabledMcpTools,
+	providerIdentifiers,
 } from "@roo-code/types"
 import { TelemetryService } from "@roo-code/telemetry"
 import { CloudService } from "@roo-code/cloud"
@@ -4224,7 +4225,7 @@ export class Task extends EventEmitter<TaskEvents> implements TaskLike {
 		// but uses allowedFunctionNames to restrict which tools can be called.
 		// Other providers (Anthropic, OpenAI, etc.) don't support this feature yet,
 		// so they continue to receive only the filtered tools for the current mode.
-		const supportsAllowedFunctionNames = apiConfiguration?.apiProvider === "gemini"
+		const supportsAllowedFunctionNames = apiConfiguration?.apiProvider === providerIdentifiers.gemini
 
 		{
 			const provider = this.providerRef.deref()