Cells support for Secrets Manager
## Executive Summary
GitLab Secrets Manager needs to support Cell in Q3.
Related: https://gitlab.com/groups/gitlab-com/gl-infra/-/work_items/1871+
See discussion in https://gitlab.com/groups/gitlab-org/-/epics/10723#note_2658370862
<details>
<summary>Overview of OpenBao deployments for Cell support</summary>
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</details>
#### Engineering Assessment
[Brief description of the engineering assessment of this candidate item.]
#### Dependencies
Review and list dependencies:
- [ ] Team dependencies:
- Tenant Scale : Organizations
- Geo?
- [ ] Epic/Issue dependencies
- https://gitlab.com/groups/gitlab-org/-/epics/10723+
- [ ] External dependencies:
#### DRIs
- **PM**: @jrandazzo
- **EM**: @mmishaev
- **UX/PDM**: N/A
- **Group(s)**: Pipeline Security
- **Engineering Owner**: [Stage level EM]
#### Initiative Driver - Product or Engineering?
- [ ] **Product-driven initiatives (P1/P2/P3)** - Customer-facing features or improvements driven by Product teams that require engineering resources and commitment
- These initiatives require a Product Priority label (P1/P2/P3)
- They may also receive GTM tier labels (T1/T2/T3) for external communication
- [x] **Engineering-driven initiatives (E1/E2/E3)** - Internal technical improvements that may not have customer-facing components
- These initiatives require an Engineering Priority label (E1/E2/E3)
- They have internal visibility only and are not externally communicated
- Examples include: technical debt reduction, infrastructure improvements, refactoring, dependency upgrades
#### Sizing and Funding (Optional)
- **Size**: [XS/S/M/L/XL]
- **Funding Status**: [Funded/Partially funded/Not funded]
---
### Hygiene Guidelines
:bulb: _See additional details about this process at https://handbook.gitlab.com/handbook/product-development/r-and-d-interlock/
##### :one: Pre-Interlock
- [x] Update epic description with all relevant information
- [ ] Ensure all dependencies are identified
- [x] Apply appropriate labels (see below)
- [ ] Apply target delivery Milestone
- [ ] Update interlock status as discussions progress (via label)
##### :two: Post-Interlock: once quarter begins
- Update health status weekly (via label)
- Document any newly identified risks or dependencies
- Link to implementation epics/issues as work begins
- Flag any scope or timeline changes immediately
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- [ ] Investment theme (Investment theme::Core-Devops, Investment theme::Security-Compliance, Investment theme::AI across SDLC)
- [ ] Platforms (platform: GitLab.com, platform: dedicated, platform: dedicated for gov, platform: self-managed)
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- [ ] Quarter (FY27 Q1, FY27 Q2, FY27 Q3, FY27 Q4)
- [ ] Pre-interlock status label (interlock status::New/Proposal in progress, interlock status::cancelled, etc)
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- [ ] Post-interlock, once quarter begins update health weekly (health::on track, health::needs attention, health::at risk)
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epic