fix(golemcore/notion): restore spring constructor wiring

[golemcore1]

Summary

• fix Spring bean instantiation for the Notion plugin by making NotionReindexCoordinator use one explicit runtime constructor and test-only scheduler/clock overrides
• add a Spring wiring regression test proving the Notion plugin context can create NotionReindexCoordinator and NotionPluginSettingsContributor without default-constructor fallback
• adapt the coordinator unit test to use test setters instead of an alternate constructor path
• bump golemcore/notion from 1.0.0 to 1.0.1 and add matching registry metadata for the patch release
• validate targeted Notion tests, compile, formatter validation, and repository metadata consistency