feat: introduce managed mongodb orchestration for local development

[cardoso]

Proposed changes (including videos or screenshots)

This PR introduces a new managed development database workflow and integrates it into local Meteor startup.

Main changes:

1. Added a new @rocket.chat/dev-db package with a command lifecycle for up, down, status, url, logs, doctor, and reset.
2. Implemented backend selection with policy controls and explicit override support:

• external
• docker
• binary
• auto/preference policies

3. Added robust lifecycle safety mechanisms:

• lock/state management
• deterministic exit behavior
• health checks and readiness gates

4. Implemented Docker backend support for managed MongoDB lifecycle.
5. Implemented Binary backend support with local binary resolution and managed process lifecycle.
6. Added deterministic seed profiles and reset-with-seed support.
7. Integrated managed DB startup into Meteor dev flow by resolving DB URLs before launching Meteor.
8. Added root scripts for easy dev-db operations.
9. Moved dev-db documentation into a dedicated document and removed the temporary section from the Meteor modern stack doc.

Issue(s)

Steps to test or reproduce

1. Build dev-db:

• yarn workspace @rocket.chat/dev-db build

2. Start managed DB:

• yarn dev-db:up

3. Validate state:

• yarn dev-db:status
• yarn dev-db:url

4. Run Meteor with managed DB:

• yarn dev

5. Validate backend overrides:

• DEV_DB_BACKEND=docker yarn dev-db:up
• DEV_DB_BACKEND=binary yarn dev-db:up
• DEV_DB_BACKEND=external DEV_DB_EXTERNAL_MONGO_URL=<mongo-url> yarn dev-db:up

6. Validate reset + seed:

• yarn dev-db:reset --seed demo

7. Teardown:

• yarn dev-db:down

Further comments

• A rollback path is available via DEV_DB_BYPASS_MANAGED=1.
• This change is designed to improve local setup consistency while preserving flexibility across environments.

[dionisio-bot]

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 69.84%. Comparing base (981af32) to head (e9bd703).

Additional details and impacted files

@@             Coverage Diff             @@
##           develop   #40350      +/-   ##
===========================================
- Coverage    69.86%   69.84%   -0.02%     
===========================================
  Files         3298     3298              
  Lines       119347   119347              
  Branches     21530    21506      -24     
===========================================
- Hits         83377    83357      -20     
- Misses       32672    32692      +20     
  Partials      3298     3298              

Flag	Coverage Δ
unit	70.58% <ø> (-0.04%)	⬇️

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