fix(core): allow disabling title temperature #2398

Job	Run time
E2E Tests	1m 46s
PostgreSQL Integration Tests	33s
Build (Node 20)	3m 16s
Commitlint	15s
Build (Node 22)	3m 53s
Build (Node 24)	3m 32s
Lint (Node 20)	51s
Lint (Node 22)	1m 19s
Lint (Node 24)	1m 21s
Test docs-mcp	1m 6s
Test cli	1m 45s
Test create-voltagent-app	1m 12s
Test internal	1m 3s
Test supabase	1m 34s
Test postgres	1m 33s
Test core	2m 10s
Test server-core	1m 32s
Test logger	1m 20s
Test libsql	1m 43s
Test voice	1m 32s
	33m 16s

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