refactor: simplify CLI surface and add end-to-end smoke coverage

[ianalloway]

What changed

• Replaced the hand-written if/elif CLI router with a compact command table.
• Removed the duplicate top-level retry command; solvent jobs retry <id> is now the single retry path.
• Made jobs retry actually work and normalized --json handling across subcommands.
• Removed the unsolicited background PyPI thread; upgrade checks are explicit via solvent upgrade.
• Replaced fragile INSERT OR REPLACE webhook logging with a real upsert that preserves the original receive timestamp.
• Added a context manager/close() for webhook logging and made replay verification explicit.
• Deduplicated server job submission and brief lookup helpers.
• Simplified event capture so server mode no longer double-captures agent events.
• Tightened Telegram HTTP handling and dependency guidance.
• Removed the redundant architecture document and collapsed duplicated README/production/Telegram documentation.
• Added lightweight end-to-end smoke tests for the CLI, offline demo, guardrails, doctor, worker, web app, and optional Telegram path.

Verification encoded in CI

The branch adds an e2e job that runs:

• CLI help/version/finance/jobs/webhooks
• offline batch demo
• guardrail demo
• doctor (allowing expected missing-live-integration diagnostics)
• one-pass worker
• web health/dashboard/chat/job submission/brief authorization flows
• Telegram application construction with a fake token when the optional extra is installed

Notes

This is deliberately a simplification pass: one command path per operation, fewer background side effects, less duplicate documentation, and broader feature-surface smoke coverage.

[ianalloway]

Closing as superseded by desloppify CLI simplification (#55).