refactor(scripts): streamline wallet-operator-mapper utilities

Remove single-purpose investigation scripts and add general-purpose
query utilities for ongoing operator management.

Removed:
- calculate-all-beta-staker-weights.js (governance task complete)
- calculate-allowlist-weights.js (superseded)
- generate-allowlist-weights-final.js (output saved)
- check-current-pool-weights.js (investigation complete)
- check-sortition-pool-divisor.js (findings incorporated)
- investigate-unknown-operator.js (one-time investigation)
- verify-missing-wallets.js (specific verification done)

Added utility scripts:
- query-proof-of-funds.js: Generate proof-of-funds reports
- query-sortition-pool.js: Check operator pool status
- query-all-pool-operators.js: Discover all pool operators
- query-all-stakers.js: Verify staker documentation completeness

Updated README to document all remaining scripts in Main and
Utility sections.

Author: lrsaturnino

scripts/wallet-operator-mapper/README.md

@@ -76,6 +76,30 @@ Verifies operator list completeness against CSV data.
 - **Purpose**: Data quality checks
 - **Usage**: Optional validation step
 
+## Utility Scripts
+
+### query-proof-of-funds.js
+Queries ALL tBTC wallets from Bridge contract and their Bitcoin balances.
+- **Requirements**: Archive node RPC + internet (uses mempool.space API)
+- **Runtime**: Several minutes (rate-limited Bitcoin API calls)
+- **Output**: JSON with wallet PKHs, Bitcoin addresses, and balances
+- **Usage**: Generate proof-of-funds reports for audits
+
+### query-sortition-pool.js
+Checks operators from `operators.json` against sortition pool status.
+- **Output**: `sortition-pool-operators.json`
+- **Usage**: Verify which operators are active in the pool
+
+### query-all-pool-operators.js
+Discovers ALL operators in sortition pool by iterating member IDs.
+- **Output**: `pool-operators-complete.json`
+- **Usage**: Find operators not in our known list (completeness check)
+
+### query-all-stakers.js
+Queries all stakers from TokenStaking contract events.
+- **Runtime**: ~1 minute (queries historical events)
+- **Usage**: Verify completeness of staker documentation
+
 ## Configuration Files
 
 ### operators.json ⭐ CRITICAL