Tests configure CDS via process.env.cds_requires_* string-JSON instead of profiles/config

[sjvans]

Several test files configure CDS by assigning string-JSON to process.env.cds_requires_* (and similar) at module top, instead of using cds's normal profile / .cdsrc.json / cds.test() config mechanism.

Sites:

• test/tracing-messaging-inboxed.test.js, test/tracing-messaging-persistent-outbox.test.js, test/tracing-messaging-without-outbox.test.js — process.env.cds_requires_messaging = JSON.stringify({ ... })
• test/logging.test.js — process.env.cds_requires_telemetry_tracing = JSON.stringify({ exporter: false }) and process.env.cds_log = JSON.stringify({ ... })
• test/passport.test.js — process.env.cds_requires_scheduling = 'false'
• test/tracing-attributes.test.js — process.env.cds_remote_native__fetch = 'true'

Why this is worth fixing

• Fragile & load-order-sensitive: the assignment must run before any @sap/cds require, or it's silently ignored. This module-load-order coupling is exactly what forced the delete cds.env hack that test: run full suite on HANA + fix two HANA span/metric bugs (#477 §2, §5) #481 had to remove (reading cds.env at collection time froze the singleton before the profile applied).
• Stringly-typed: hand-built JSON strings, no validation, easy to get subtly wrong.
• Bypasses the intended mechanism: cds already supports --profile + .cdsrc.json profiles and cds.test(dir, ...args) options; most of these overrides could be expressed there instead.

Follow-up

Move these config overrides to proper --profile / .cdsrc.json profiles or cds.test(...) arguments where possible, and reduce reliance on process.env.cds_requires_*.

Origin: maintainer review on #481 (the delete cds.env fragility thread). Part of the test-quality cluster (#477 / #478 / #475).

[sjvans]

Done via #493 (merged to develop f125e34): all 8 process.env.cds_* string-JSON config sites replaced with .cdsrc.json profiles / cds.test() args. Root cause fixed — moved the base cds.log/messaging defaults out of package.json (which loads after .cdsrc.json, last-writer-wins) into .cdsrc.json base so profiles win. Zero process.env.cds_* remain; independently reviewed APPROVE, base-config equivalence verified.