fix: align ADR-0014 tag format with implementation

Update tag format from smartem-agent-v* to smartem-decisions-v*
to match the actual release workflow implementation.

- Unified tag format for all components (no separate backend tags)
- Matches release-smartem-decisions.yml workflow

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

Author: vredchenko

docs/decision-records/decisions/0014-smartem-release-architecture.md

@@ -53,15 +53,14 @@ Publish `smartem-decisions` to PyPI with optional dependency groups:
 ### Version Strategy
 
 - **Package version**: Derived from git tags using setuptools_scm
-- **Agent releases**: Tagged with `smartem-agent-v*` format
-- **Backend releases**: Future work with `smartem-backend-v*` tags
+- **Releases**: Tagged with `smartem-decisions-v*` format (unified for all components)
 - **Shared versioning**: All components share the same version for API compatibility
 
 ### Release Triggers
 
 | Event | Condition | Result |
 |-------|-----------|--------|
-| Tag `smartem-agent-v*` | Always | Stable release to GitHub + PyPI |
+| Tag `smartem-decisions-v*` | Always | Stable release to GitHub + PyPI |
 | Push to main | Agent paths changed | RC pre-release to GitHub only |
 | Pull request | Agent paths changed | Build + test validation only |