refactor(shared): remove the fxa-shared/monitoring wrapper

[vbudhram]

Because

• main.ts imports ./monitoring, which already starts tracing. Then bootstrap() calls initTracing a second time.
• The new @fxa/shared/otel implementation logs a Tracing already initialized! warning on a repeat call. The event-broker prints that warning on every startup.

This pull request

• Removes the second initTracing call and its import from main.ts.
• Removes the mozlog import, which the removed call was the only user of. The package still depends on mozlog through monitoring.ts.
• Keeps import './monitoring'; first, so tracing still starts before the framework loads.

Issue that this pull request solves

Closes: https://mozilla-hub.atlassian.net/browse/FXA-10645

Checklist

Put an x in the boxes that apply

• My commit is GPG signed.
• If applicable, I have modified or added tests which pass locally.
• I have added necessary documentation (if appropriate).
• I have verified that my changes render correctly in RTL (if appropriate).
• I have manually reviewed all AI generated code.

How to review (Optional)

• Key files/areas to focus on: packages/fxa-event-broker/src/main.ts.
• Suggested review order: read main.ts, then monitoring.ts to confirm tracing still starts there.
• Risky or complex parts: none. The import order matters, so ./monitoring must stay first.

Screenshots (Optional)

None. This change does not touch the user interface.

Other information (Optional)

• nx run fxa-event-broker:test-unit: 61 passed, 0 failed.
• nx lint fxa-event-broker: exit 0.
• The sibling service fxa-admin-server already follows this pattern. Its main.ts imports ./monitoring and never calls initTracing itself.

[Copilot]

Pull request overview

Removes the legacy monitoring wrapper while preserving tracing-before-Sentry initialization and migrating supported services to @fxa/shared/otel.

Changes:

• Replaces wrapper usage with direct tracing and Sentry initialization.
• Migrates tracing imports and build paths.
• Updates auth-server monitoring tests.

Reviewed changes

Copilot reviewed 14 out of 15 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
packages/fxa-shared/package.json	Removes the monitoring export.
packages/fxa-shared/monitoring/index.ts	Deletes the legacy wrapper.
packages/fxa-profile-server/lib/monitoring.js	Initializes tracing and Sentry directly.
packages/fxa-event-broker/tsconfig.build.json	Adds shared-library path mappings.
packages/fxa-event-broker/src/monitoring.ts	Uses the shared OTEL library.
packages/fxa-event-broker/src/main.ts	Migrates the tracing import.
packages/fxa-event-broker/src/config.ts	Uses shared tracing configuration.
packages/fxa-customs-server/lib/monitoring.js	Initializes tracing and Sentry directly.
packages/fxa-auth-server/lib/routes/index.js	Migrates tracing utilities.
packages/fxa-auth-server/lib/monitoring.spec.ts	Tests direct initialization and ordering.
packages/fxa-auth-server/lib/monitoring.js	Replaces wrapper initialization.
packages/fxa-auth-server/config/index.ts	Uses shared tracing configuration.
packages/fxa-auth-server/bin/key_server.js	Migrates the tracing provider import.
packages/fxa-admin-panel/server/lib/monitoring.ts	Replaces wrapper initialization.
packages/fxa-admin-panel/server/config/index.ts	Uses shared tracing configuration.

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