feat: convert fct_sessions to incremental

[anandgupta42]

Converted fct_sessions.sql to incremental materialization using merge strategy on revenue_date.

This is a simulated PR for testing altimate-code-actions.

[github-actions]

✅ Altimate Code — 1 model validated · 2 downstream safe

What We Checked	How	Result
Anti-Patterns (26 rules)	AST analysis	✅ Clean
Injection Safety (10 rules)	Pattern scan	✅ Safe
Breaking Changes	Schema compatibility against 2 downstream models	✅ Compatible

📋 Query Profile

	fct_sessions.sql
Complexity	Medium
Tables	2
JOINs	0
CTEs	Yes
Subqueries	Yes
Window Functions	No
Aggregation	Yes

📊 Impact — fct_sessions (🧪 2 tests depend on this model)

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_{🔍 Altimate Code v0.4.0 · Validated without hitting your warehouse · Configure · Feedback}