fix: per-slab single-source counter, per-scan ADL errors (M8+M14)

[0x-SquidSol]

Summary

M8 — Oracle single-source counter was global:

• _consecutiveSingleSource was a scalar shared across all markets
• Any dual-source market reset the counter, masking degradation for single-source markets
• Now a per-slab Map — each market tracks its own cross-validation coverage independently
• Alert includes the affected market slab address for targeted debugging

M14 — ADL errors counted per-position instead of per-scan:

• consecutiveErrors was incremented for each individual position tx failure inside the loop
• 3 failed positions in one cycle fired the alert meant for 3 consecutive failed scan cycles
• Now uses a scanHadError flag — counter increments once per failed scan, not per position
• Reset only when a scan has at least one successful send

Test plan

• All 133 tests pass

🤖 Generated with Claude Code

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ℹ️ Review info

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro

Run ID: 1fd090c1-ed50-4f92-86c6-b834f3272e28

📥 Commits

Reviewing files that changed from the base of the PR and between 3280971 and e34ff9c.

📒 Files selected for processing (2)

• src/services/adl.ts
• src/services/oracle.ts

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests

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