docs: align web-ui, cli, sdk-integrations, and ops-policy with shipped features

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Summary

Documentation-only PR. No source code changes. Brings five doc files current with features shipped in recent releases (v1.1.x–v1.2.0).

Docs added/updated

docs/web-ui.md (largest change)

• DiffPage section rewritten: documents the refactored component tree (DiffVerdictStack, DiffReleaseTwin, DiffPolicyPanel, DiffChangeImpact + DiffPricingExpand, DiffDecisionCard, diffPayload.tsx shared utilities) and the verdict-first layout.
• URL deep-linking: DiffPage (baseline, candidate, window, environment), OverviewPage (?release=), RunsPage, ActionsPage — all now documented with examples.
• OverviewPage section rewritten: documents ReleaseLifecycleStrip, the focused-release hero (triggered by ?release=), the releases table filter row, copy buttons, "Live vs Registered" status badges, collapsible metrics panel.
• New shared components: CopyTextButton (props, behavior) and ReleaseLifecycleStrip (step links, read-only mode).
• urlSearch.ts helpers section added with deep-link examples for every page.
• Routing table updated: reflects current pages and their URL param behavior.
• Component tree updated to show nested DiffPage component structure.
• CSS utility classes table extended with 15 new entries for DiffPage and OverviewPage additions.

docs/cli.md

• Added flightdeck pricing check subcommand (--max-age-days, --fail) with example output and CI usage pattern. Covers the stale-bundled-snapshot detection workflow.

docs/pricing-catalog.md

• Linked the staleness guardrails paragraph to the new cli.md § flightdeck pricing check reference.

docs/operations-and-policy.md

• Schema migration v4 added to the migrations table (promotion_requests table for approval workflow).
• Storage schema table updated from 7 to 8 tables (added promotion_requests).

docs/sdk-integrations.md

• New Module reference section documenting public APIs for all integration submodules: common.make_run_end_event, common.temporal_labels, openai_chat.run_event_from_openai_chat_completion, anthropic_messages.run_event_from_anthropic_message, openai_agents.run_event_from_openai_agents_result, langchain_callback.FlightDeckLangChainCallbackHandler, crewai_bridge.run_event_from_crew_token_totals.

Codepaths covered

• web/src/pages/DiffPage.tsx and web/src/components/diff/
• web/src/pages/OverviewPage.tsx
• web/src/components/CopyTextButton.tsx, ReleaseLifecycleStrip.tsx
• web/src/urlSearch.ts
• src/flightdeck/cli/main.py (pricing_check command)
• src/flightdeck/storage.py (migration v4 — promotion_requests)
• src/flightdeck/integrations/ (all submodules)

Key knowledge gaps addressed

• How to deep-link into DiffPage, OverviewPage, RunsPage, and ActionsPage from external tools or cross-page navigation
• What each DiffPage component renders and when (verdict vs policy vs impact vs decision)
• How to check bundled pricing snapshot freshness in CI
• Which storage table was added for the approval workflow
• What public function to call for each integration adapter (previously undocumented)