## Changes
### port.Deployer interface
- Add PatchProjectSecrets(ctx, projectName, patch) to merge key-value pairs
into all K8s secrets labeled project={projectName}
- Add RestartAll(ctx, projectName) to trigger rolling restart of all deployments
for a project, picking up fresh secrets without waiting for CI
### deployer adapter
- Implement PatchProjectSecrets: lists secrets by label, merges patch into Data,
writes each secret back
- Implement RestartAll: lists deployments by label, sets restartedAt annotation
### domain/credential.go
- Add CredentialCategoryCache = "cache" constant
- Use constant in component_infra.go (was raw string "cache")
### handlers/cache.go (new)
- POST /projects/{projectID}/cache/reprovision
- Calls CreateProjectCache (which handles delete+recreate with new password)
- Updates credential store (REDIS_URL, REDIS_URL_STAGING, REDIS_PREFIX)
- Patches all K8s secrets for the project immediately
- Triggers RestartAll so pods pick up new credentials without waiting for deploy
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
