fix: use 'patterns' namespace consistently in hooks-tools (fixes #1136)

[ripgtxgt]

Fixes #1136

Problem

hooks-tools.ts used singular 'pattern' as the memory namespace in 4 locations, while the rest of the codebase (workers/index.ts, reasoningbank/index.ts, README examples) consistently uses 'patterns' (plural).

This caused a silent data loss bug: intelligence hooks stored patterns in namespace 'pattern', but memory_search and memory_list searched in 'patterns' — stored entries were invisible to normal memory operations.

Fix

Changed all 4 occurrences in hooks-tools.ts:

• namespace: 'pattern' → namespace: 'patterns'
• || 'pattern' default → || 'patterns'
• Description string updated to reflect correct default

- namespace: 'pattern',
+ namespace: 'patterns',

- const namespace = (params.namespace as string) || 'pattern';
+ const namespace = (params.namespace as string) || 'patterns';

[ripgtxgt]

Hi team 👋 Just checking in — any updates on this one? Happy to make adjustments if needed. Thanks!

[mixingchex]

APPROVE — Reviewed via hive-mind swarm analysis.

All 4 changes are correct and necessary. The singular 'pattern' namespace caused silent data loss: patterns stored via intelligence hooks were invisible to memory search/list which uses 'patterns' (plural).

Grep confirms no remaining instances of the incorrect singular namespace.

Suggestions (non-blocking):

• Extract 'patterns' to a shared constant to prevent future drift
• Add regression test for namespace consistency