content-addressed blob storage: blob_storage.py, memory, local, and S3 adapters

workplans/KONT-WP-0013-blob-storage-content-streaming.md

@@ -4,7 +4,7 @@ type: workplan
 title: "Blob Storage Deduplication And Content Streaming"
 domain: markitect
 repo: kontextual-engine
-status: active
+status: completed
 owner: codex
 topic_slug: markitect
 planning_priority: high
@@ -37,6 +37,10 @@ This workplan adds content-addressed blob infrastructure and stream interfaces.
 It does not introduce AtomPub, SOAP/Web Services, chunk-level deduplication, or
 a general document-management storage model.
 
+It includes an optional S3 backend as an infrastructure adapter behind the same
+blob storage port. S3 object keys are digest-derived, so object storage can be
+used without changing engine semantics or CMIS profile governance.
+
 ## Architecture Constraint
 
 Blob bytes are infrastructure state. Engine semantics remain attached to
@@ -48,7 +52,7 @@ engine-native content services instead of bypassing governance.
 
 ```task
 id: KONT-WP-0013-T001
-status: todo
+status: done
 priority: high
 state_hub_task_id: "6bb5b49a-cf9f-47ce-86d3-24b47a20a2c6"
 ```
@@ -66,7 +70,7 @@ Acceptance:
 
 ```task
 id: KONT-WP-0013-T002
-status: todo
+status: done
 priority: high
 state_hub_task_id: "661386c7-8094-4f0f-928c-c17f5b3a9132"
 ```
@@ -82,7 +86,7 @@ Acceptance:
 
 ```task
 id: KONT-WP-0013-T003
-status: todo
+status: done
 priority: high
 state_hub_task_id: "00bc34c5-0f79-47b6-b305-f47311edd3a7"
 ```
@@ -98,7 +102,7 @@ Acceptance:
 
 ```task
 id: KONT-WP-0013-T004
-status: todo
+status: done
 priority: medium
 state_hub_task_id: "cc4445d9-f773-4337-afd4-aeccc743dc1e"
 ```
@@ -113,7 +117,7 @@ Acceptance:
 
 ```task
 id: KONT-WP-0013-T005
-status: todo
+status: done
 priority: high
 state_hub_task_id: "db0e8a2d-50ce-439c-8393-d65e2fc4bc9e"
 ```
@@ -129,7 +133,7 @@ Acceptance:
 
 ```task
 id: KONT-WP-0013-T006
-status: todo
+status: done
 priority: high
 state_hub_task_id: "2f1da1fb-9634-4ba6-931a-3e29394efd37"
 ```
@@ -146,7 +150,7 @@ Acceptance:
 
 ```task
 id: KONT-WP-0013-T007
-status: todo
+status: done
 priority: medium
 state_hub_task_id: "987ad4f6-8658-4e93-82c2-b9fa0a3a2270"
 ```
@@ -168,3 +172,15 @@ Acceptance:
 - Existing tests continue to pass.
 - Focused dedupe/content-stream tests cover duplicate content, readback,
   policy denial, cleanup dry-run, and CMIS integration.
+
+## Completion Notes
+
+- Implemented `BlobStorage` port with `put_bytes`, `read_bytes`, `iter_bytes`,
+  `stat`, `exists`, and `delete_unreferenced`.
+- Added in-memory, local filesystem, and optional S3 content-addressed adapters.
+- Added governed representation content service for byte-backed
+  representations, chunked streams, policy checks, audit events, and cleanup.
+- Wired CMIS `setContentStream` and byte stream routes through the content
+  service; repeated content updates now expose the latest source representation.
+- Added tests for dedupe, local/S3 adapter behavior, content-kind reads, policy
+  denial, cleanup dry-run, and CMIS stream integration.