v1.1.2: More FIR latency options, lower default

FIR quality selector now offers 6 choices:
512 (~6ms), 1024 (~12ms), 2048 (~23ms), 4096 (~46ms), 8192 (~93ms), 16384 (~186ms)
Default changed to 2048 (~23ms) for lower latency.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

CMakeLists.txt

@@ -1,5 +1,5 @@
 cmake_minimum_required(VERSION 3.22)
-project(InstaLPEQ VERSION 1.1.0)
+project(InstaLPEQ VERSION 1.1.2)
 
 set(CMAKE_CXX_STANDARD 17)
 set(CMAKE_CXX_STANDARD_REQUIRED ON)