docs(thoughts): add controllability and graded-belief syntheses

[nooarche]

Summary

• Adds a raw thought on suspicion, controllability attribution, active causal disambiguation, threat/responsibility separation, and serotonin pathway heterogeneity.
• Adds the clinical-developmental continuation on graded belief and Protected-Core Error Accommodation.
• Records version-placement rationale for later harvesting.

Scope

• Raw thoughts only.
• No claim-registry or version-plan changes.
• No implementation authorization.

Validation

• Both Markdown files were checked locally.
• Both target paths were absent from master before creation.