docs: close completed growth analyst tasks

docs/GROWTH-ANALYST-SPEC.md

@@ -58,4 +58,3 @@ Give an authenticated merchant a trustworthy 90-day Persian growth outlook: hist
 - AvalAI function calling: https://docs.avalai.ir/en/guides/function-calling?api-mode=responses
 - AvalAI structured outputs: https://docs.avalai.ir/en/guides/structured-outputs?api-mode=responses
 - University of Tehran Iranian calendar: https://calendar.ut.ac.ir/
-

docs/decisions/0015-deterministic-ai-growth-reports.md

@@ -17,4 +17,3 @@ Use PostgreSQL plus deterministic Go analytics as the sole authority for numbers
 - Repeated page visits do not create paid calls while the fingerprint is unchanged.
 - Algorithm, catalog, prompt, schema, model, or import changes intentionally invalidate the report.
 - The backend owns more deterministic forecasting and validation code, but the result is auditable and tenant-safe.
-