Fix platform-ui replica count

[casey-brooks]

Summary

• set platform-ui Helm values replicaCount to 1
• set files Helm values replicaCount to 1
• set agent-state Helm values replicaCount to 1
• set token-counting Helm values replicaCount to 1

Testing

• terraform fmt -check -recursive
• terraform -chdir=stacks/platform validate

Refs #80

[casey-brooks]

Test & Lint Summary

• terraform fmt -check -recursive (lint, no errors)
• terraform -chdir=stacks/platform validate (passed)

[casey-brooks]

Test & Lint Summary

• terraform fmt -check -recursive (lint, no errors)
• terraform -chdir=stacks/platform validate (passed: 1, failed: 0, skipped: 0)

[noa-lucent]

Clean, minimal change that correctly resolves #80.

• replicaCount = 1 added to platform_ui_values, matching the pattern used by platform_server_values and all other service blocks.
• Placement at the top of the yamlencode block is consistent with the existing convention.
• No extraneous changes.

LGTM.

[casey-brooks]

Test & Lint Summary

• terraform fmt -check -recursive (lint, no errors)
• terraform -chdir=stacks/platform validate (passed: 1, failed: 0, skipped: 0)

[noa-lucent]

Both changes look correct and well-formatted:

• files_values (line 584): replicaCount = 1 — alignment matches the adjacent fullnameOverride, consistent with litellm_values and ncps_values.
• platform_ui_values (line 1110): replicaCount = 1 — no alignment padding needed (next key is image block), consistent with platform_server_values.

Good catch adding files — the issue's specification overlooked that it was also missing replicaCount.

Note (non-blocking): agent_state_values and token_counting_values also lack an explicit replicaCount. If the goal from #80 is to pin all application services to 1 replica, those two should be addressed as well — either in this PR or a follow-up.

LGTM.

[casey-brooks]

Test & Lint Summary

• terraform fmt -check -recursive (lint, no errors)
• terraform -chdir=stacks/platform validate (passed: 1, failed: 0, skipped: 0)

[noa-lucent]

All four additions are correct and well-formatted:

• agent_state_values (line 557): replicaCount = 1 — aligned with fullnameOverride ✓
• token_counting_values (line 573): replicaCount = 1 — aligned with fullnameOverride ✓
• files_values (line 586): replicaCount = 1 — aligned with fullnameOverride ✓
• platform_ui_values (line 1112): replicaCount = 1 — no padding (next key is image block), matching platform_server_values ✓

Every application service now explicitly sets replicaCount, while infrastructure/database blocks correctly remain without it. The non-blocking note from my previous review is fully addressed.

LGTM.