perf(shared): optimize hot-path utilities across plugin

- task-list: replace O(n³) blocker resolution with Map lookup (C4)
- logger: buffer log entries and flush periodically to reduce sync I/O (C5)
- plugin-interface: create chatParamsHandler once at init (H3)
- pattern-matcher: cache compiled RegExp for wildcard matchers (H6)
- file-reference-resolver: use replaceAll instead of split/join (M9)
- connected-providers-cache: add in-memory cache for read operations (L4)

src/shared/logger.ts

@@ -1,16 +1,42 @@
-// Shared logging utility for the plugin
-
 import * as fs from "fs"
 import * as os from "os"
 import * as path from "path"
 
 const logFile = path.join(os.tmpdir(), "oh-my-opencode.log")
 
+let buffer: string[] = []
+let flushTimer: ReturnType<typeof setTimeout> | null = null
+const FLUSH_INTERVAL_MS = 500
+const BUFFER_SIZE_LIMIT = 50
+
+function flush(): void {
+  if (buffer.length === 0) return
+  const data = buffer.join("")
+  buffer = []
+  try {
+    fs.appendFileSync(logFile, data)
+  } catch {
+  }
+}
+
+function scheduleFlush(): void {
+  if (flushTimer) return
+  flushTimer = setTimeout(() => {
+    flushTimer = null
+    flush()
+  }, FLUSH_INTERVAL_MS)
+}
+
 export function log(message: string, data?: unknown): void {
   try {
     const timestamp = new Date().toISOString()
     const logEntry = `[${timestamp}] ${message} ${data ? JSON.stringify(data) : ""}\n`
-    fs.appendFileSync(logFile, logEntry)
+    buffer.push(logEntry)
+    if (buffer.length >= BUFFER_SIZE_LIMIT) {
+      flush()
+    } else {
+      scheduleFlush()
+    }
   } catch {
   }
 }