Update work items and daily logs for project fidelity

- Updated work items with new statuses, notes, and dependencies:
  - `PDIAP-15838` moved to Done, draft PR remains unmerged.
  - `PDIAP-15836` status updated to backlog-ready, sequenced after `PDIAP-15838`.
  - `PDIAP-12284` reopened for UIKit removal, dependency for `PDIAP-15836`.
  - Added new backlog items: `PDIAP-11961`, `PDIAP-11962`, `PDIAP-11562`, `PDIAP-12226`, `PDIAP-12227`, `PDIAP-12228`.
- Completed `PDIAP-16167`, documented findings in Confluence.
- Created daily log for 2026-05-05 summarizing work item updates and backlog triage.
- Added diagnostic script for workspace analysis.

project-knowledge/02-work-items/pdiap-12226.md

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+---
+type: work-item
+project: fidelity
+status: backlog-partial
+ticket: PDIAP-12226
+title: "iOS: Implement SpartaSDK initialization and JSON decoding"
+systems: [sparta, xflowsdk]
+workstreams: [sparta, backlog-triage]
+people: [jeff-dewitte, aylwing-olivas]
+related: [pdiap-12227, pdiap-12228]
+updated: 2026-05-05
+tags:
+  - work-item
+  - fidelity
+  - sparta
+---
+
+# PDIAP-12226 - iOS: Implement SpartaSDK initialization and JSON decoding
+
+## Status
+
+- Backlog item; partially complete.
+
+---
+
+## Current Understanding
+
+- Last known work was a decoding-layer refactor based on internal feedback from Aylwing.
+- Direction was to make decoding strict so malformed backend responses surface errors to the consumer instead of silently skipping unsupported components.
+- Earlier approach used a `strict mode` toggle where unsupported components were omitted from rendering.
+- Refactor is still in progress; if no new component types are added, it may not require much beyond the existing work.
+
+---
+
+## Historical Slack Context
+
+- October 2025 Slack context shows the work started from `PDIAP-11956` / `PDIAP-12066` exploration: dynamic JSON decoding, `SpartaNodeRegistry`, strict-mode behavior, and fallback handling for unknown node types.
+- By October 21, 2025, decoding tests validated fallback handling and registry lookups in an internal `SwiftUIBuilder` PR.
+- November 2025 planning split the remaining SpartaSDK work into separate stories; this one became the initialization and JSON-decoding story.
+- November 20-24, 2025 Slack context says `PDIAP-12226` was moved to a later sprint and David was reviewing whether the current JSON-decoding implementation was ready for a formal PR.