feat(cli-sdk): add anonymous telemetry to all CLI tools

[arein]

Summary

• Adds a lightweight, fire-and-forget telemetry module (cli-sdk/src/telemetry.ts) that sends anonymous usage events to the Pulse analytics endpoint (pulse.walletconnect.com/e)
• Integrates telemetry into all 4 CLIs: walletconnect, walletconnect-staking, walletconnect-pay, companion-wallet
• Tracks command lifecycle (command_invoked / command_succeeded / command_failed), wallet connections, on-chain transactions, and bridge completions

Details

Opt-out: WALLETCONNECT_TELEMETRY=0 env var or walletconnect config set telemetry false

Privacy: Error messages are sanitized — wallet addresses (0x...) are stripped and messages truncated to 256 chars before sending.

Reliability: Fire-and-forget (fetch().catch(() => {})), flush with 2-second timeout cap via Promise.race, never blocks process exit. No-op client returned when telemetry is disabled or no project ID is configured.

Region: Endpoint auto-selects .org for China/HK timezones, .com otherwise.

Event taxonomy:

Event	When	Extra Props
command_invoked	Every CLI command start	{ command }
command_succeeded	Command completes OK	{ command }
command_failed	Command errors	{ command, error }
connection_established	Wallet connected	{ command }
transaction_sent	On-chain tx submitted	{ command, chainId }
bridge_completed	Swidge/bridge done	{ command, fromChain, toChain }

Test plan

• 15 new tests in cli-sdk/test/telemetry.spec.ts covering no-op paths, payload shape, flush behavior, error handling, and address sanitization
• npm run build passes
• npm run test passes (all 78 tests)
• npm run lint passes
• Manual: WALLETCONNECT_TELEMETRY=0 walletconnect --version produces no network calls
• Manual: With project-id set, commands send events to pulse endpoint

🤖 Generated with Claude Code