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Task #25: Provision LNbits on Hermes VPS for real Lightning payments. Changes: - dev.ts: /dev/stub/pay/:hash now works in both stub and real LNbits modes. In real mode, looks up BOLT11 from invoices/sessions/bootstrapJobs tables then calls lnbitsService.payInvoice() (FakeWallet accepts it). - sessions.ts: Remove all stubMode conditionals on paymentHash — always expose paymentHash in invoice, pendingTopup, and 409-conflict responses. - jobs.ts: Remove stubMode conditionals on paymentHash in create, GET awaiting_eval, and GET awaiting_work responses. - bootstrap.ts: Remove stubMode conditionals on paymentHash in POST create and GET poll responses. Simplify message field (no longer mode-conditional). - Hermes VPS: Funded LNbits wallet with 1B sats via DB credit so payInvoice calls succeed (FakeWallet checks wallet balance before routing). Result: 29/29 testkit PASS in real LNbits mode (LNBITS_URL + LNBITS_API_KEY set).