feat(openclaw-plugin): add configurable capture skipSessionPatterns

[duoyidavid-eng]

Summary

Allow users to configure session key substrings to skip memory capture via capture.skipSessionPatterns config option.

Default: [":cron:"] (backward compatible — cron sessions still skipped by default)

Motivation

Previously, only cron sessions were hard-coded to skip capture. Users who run multiple agents (e.g. a dedicated wechat agent) had to modify source code to exclude specific agents from memory capture.

Changes

File	Change
src/types.ts	Add skipSessionPatterns?: string[] to MemosLocalConfig.capture
src/config.ts	Resolve config with default [":cron:"]
src/capture/index.ts	Add skipSessionPatterns parameter to captureMessages(), filter before processing
src/index.ts	Pass config value to captureMessages()

Example config

{
  "capture": {
    "skipSessionPatterns": [":cron:", "agent:wechat", "agent:bot"]
  }
}

This replaces the previous hard-coded cron check and makes session filtering data-driven.

[Hun-ger]

Hi @duoyidavid-eng , thanks for this great initiative! While this PR successfully prevents matched sessions (like cron) from being captured (written) into memory, it doesn't stop them from triggering auto-recall (reading). This means these background sessions will still perform unnecessary memory searches and suffer from context pollution (related to Issue #1311). To fully fix this, the filtering must apply to both phases. Our official team will take over to implement a comprehensive solution that blocks both capture and auto-recall based on your idea. We will likely close this PR in favor of the complete fix, but we truly appreciate your contribution and inspiration!