docs(changelog): add entries for plan list namespace, MCP 1.4.0 fix, CI artifacts, IssueMeta fix

Add CHANGELOG [Unreleased] entries for four recently merged commits that
were missing documentation:

- CLI: agents plan list --namespace/-n filter option (#2165, PR #2616)
- MCP: correct error extraction from content[0].text per MCP 1.4.0 (#2158, PR #2600)
- CI: nox output captured as Forgejo CI artifacts (#2750)
- Agents: correct IssueMeta schema for Forgejo dependency API (#2750)

ISSUES CLOSED: #2597

CHANGELOG.md

@@ -96,6 +96,33 @@ The format follows [Keep a Changelog](https://keepachangelog.com/en/1.1.0/).
   (including the previously undocumented `e2e_tests` and `helm` jobs), the
   job dependency graph, and the prohibition on direct pushes to `master`. (#2597)
 
+- **CLI — `agents plan list --namespace/-n` filter option**: `agents plan list`
+  now accepts `--namespace`/`-n` to filter plans by namespace, mirroring the
+  existing `--namespace` option on `agents action list`. The service layer
+  already supported namespace filtering; only the CLI layer was missing the
+  option. The TUI Filters panel displays the active namespace filter when
+  provided. (#2165)
+
+- **MCP — Correct error extraction from MCP 1.4.0 protocol responses**:
+  `MCPToolAdapter.invoke()` now extracts error messages from
+  `content[0].text` per the MCP 1.4.0 protocol, replacing the previous
+  `result.get('error', 'unknown error')` lookup that silently swallowed all
+  real error messages from MCP 1.4.0-compliant servers. (#2158)
+
+- **CI — Nox output captured as Forgejo CI artifacts**: All 8 nox-running CI
+  jobs now capture stdout+stderr to `build/nox-<job>-output.log` via `tee`
+  and upload the log as a named artifact (`ci-logs-<job>`, 30-day retention).
+  Agent definitions updated with a CI Log Artifacts section explaining which
+  artifact corresponds to each domain. (#2750)
+
+- **Agents — Correct IssueMeta schema for Forgejo dependency API**: All agent
+  definitions that call the Forgejo blocks/dependencies REST API now use the
+  correct `IssueMeta` schema (`{"owner": "...", "repo": "...", "index": N}`)
+  instead of the undocumented `{"dependency_id": N}` format that returned
+  404 errors. Affects `ca-new-issue-creator`, `ca-pr-api-creator`,
+  `ca-state-reconciler`, `ca-project-owner`, `ca-backlog-groomer`, and
+  `ca-epic-planner`. (#2750)
+
 - Fixed session leak in all `AutomationProfileRepository` public methods
   (`get_by_name()`, `list_all()`, `upsert()`, and `delete()`): added
   `finally: if self._auto_commit: session.close()` blocks matching the