fix(env): simplify self-host runtime defaults

[izadoesdev]

SELFHOST=true keeps omitted service URLs local, lets queues reuse REDIS_URL, and prevents server product telemetry from starting, even with copied Databuddy keys. Explicit URL overrides still win; hosted defaults remain unchanged.

Adds explicit workspace dependencies for the existing environment helper. No new runtime settings or schema changes.

Validation: 30 focused environment, browser-config, Redis, and telemetry tests pass. The browser regression verifies both mode values, local versus hosted production URLs, and preserved pixel behavior. Root lint (22 policy checks), all 33 typecheck tasks, frozen install, and all 29 pre-push tasks pass.

Depends on #816 for exposing self-host mode to the dashboard browser bundle and #806 for SELFHOST forwarding through Turbo; both are merged. Rebased directly onto staging containing #816. Preserves the existing Docker build argument and browser-mode forwarding; complements the short environment template and Compose setup in #804.

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Project	Deployment	Actions	Updated
databuddy-status	Ready	Preview	Sep 17, 2026 7:56am UTC

2 Skipped Deployments

Project	Deployment	Actions	Updated
dashboard	Skipped		Sep 17, 2026 7:56am UTC
documentation	Skipped		Sep 17, 2026 7:56am UTC

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Name	Status	Preview	Inspect	Updated (UTC)
links (preview)	Ready	Visit Preview	Inspect	Sep 17, 2026 7:56am

[greptile-apps]

Confidence Score: 5/5

The PR appears safe to merge; no actionable regression remains in the final change or previously reviewed runtime behavior.

Summary

This PR simplifies self-hosted runtime defaults while preserving explicit overrides and hosted behavior.

• Uses local service URLs by default when SELFHOST is enabled, including browser-facing dashboard configuration.
• Allows self-hosted BullMQ producers and workers to fall back to the shared REDIS_URL.
• Prevents server product telemetry from initializing in self-host mode.
• Adds the required workspace dependency declarations and focused regression coverage.
• Isolates Links test files to prevent shared module-mock ordering conflicts on Linux CI.

Diagram

%%{init: {'theme': 'neutral'}}%%
flowchart TD
    Mode{SELFHOST enabled?}
    Explicit{Explicit service URL?}
    Explicit -->|Yes| Override[Use explicit URL]
    Explicit -->|No| Mode
    Mode -->|Yes| Local[Use local service defaults]
    Mode -->|No| Hosted[Use hosted production defaults]
    Mode -->|Yes| TelemetryOff[Do not initialize product telemetry]
    Mode -->|Yes| QueueFallback[BullMQ may reuse REDIS_URL]
    Mode -->|No| QueueSpecific[Require queue-specific BullMQ URL]

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_{Reviews (3) · Last reviewed commit: "test(links): isolate environment module ..."}

[izadoesdev]

@greptileai review this. Final head ebe714f is rebased onto staging containing merged #816 and #806. Browser mode forwarding is now present and the existing Next regression verifies self-host and hosted production URL defaults plus signup tracking. SDK mocks use exported SDK types. The external Docker commit is preserved. All 30 focused tests, lint, 33 type tasks, and 29 pre-push tasks pass.

[izadoesdev]

@greptileai review this. Final head 218cb66 adds only --isolate to the existing Links test command, fixing the Linux CI ordering conflict where a route test replaced the shared environment module before producer tests imported readBooleanEnv. All 27 Links tests and all 29 repository test tasks pass. The previously reviewed runtime changes and merged dependency base are unchanged.