feat: implement optimization #1 - unpushed tags detection

Added unpushed tag detection to release status command to prevent
forgotten tag pushes (the critical issue from v0.10.0 release).

**Implementation**:
- Added `get_unpushed_tags()` method to GitManager
- Compares local tags with remote tags (git ls-remote)
- Handles annotated tags correctly (strips ^{} suffix)
- Added unpushed_tags to repository status dict

**CLI Enhancement**:
- `release status` now shows unpushed tags with warning emoji
- Lists all unpushed tags
- Provides helpful command to push them

**Output Example**:
```
⚠️  Unpushed Tags: 2 tag(s) not pushed to origin
    - v0.9.0
    - v0.10.0

💡 Push tags with: git push origin v0.9.0 v0.10.0
   Or push all tags: git push --tags
```

**Testing**: Verified with current repo (no unpushed tags after push)

**Files Modified**:
- capabilities/release-management/src/release_management/git/manager.py
- capabilities/release-management/src/release_management/cli/main.py

**Documentation**: Added comprehensive IMPLEMENTATION_PLAN.md with
all 9 optimizations detailed (13.5 hours total estimated)

This solves the #1 critical issue from OPTIMIZATION_ASSESSMENT.md.

capabilities/release-management/src/release_management/cli/main.py

@@ -55,6 +55,15 @@ def status(ctx):
         print(f"Latest Commit: {status_info['latest_commit']}")
         print(f"Latest Tag: {status_info['latest_tag'] or 'None'}")
         print(f"Uncommitted Changes: {'Yes' if status_info['has_changes'] else 'No'}")
+
+        # Show unpushed tags
+        unpushed_tags = status_info.get('unpushed_tags', [])
+        if unpushed_tags:
+            print(f"\n⚠️  Unpushed Tags: {len(unpushed_tags)} tag(s) not pushed to origin")
+            for tag in unpushed_tags:
+                print(f"    - {tag}")
+            print(f"\n💡 Push tags with: git push origin {' '.join(unpushed_tags)}")
+            print(f"   Or push all tags: git push --tags")
     else:
         print("Git Repository: Not available")
 

capabilities/release-management/src/release_management/git/manager.py

@@ -48,12 +48,16 @@ class GitManager:
             except subprocess.CalledProcessError:
                 latest_tag = None
 
+            # Get unpushed tags
+            unpushed_tags = self.get_unpushed_tags()
+
             return {
                 'is_repo': True,
                 'branch': current_branch,
                 'has_changes': has_changes,
                 'latest_commit': latest_commit,
-                'latest_tag': latest_tag
+                'latest_tag': latest_tag,
+                'unpushed_tags': unpushed_tags
             }
         except subprocess.CalledProcessError:
             return {'is_repo': False}
@@ -178,6 +182,47 @@ class GitManager:
         except subprocess.CalledProcessError:
             return None
 
+    def get_unpushed_tags(self, remote: str = 'origin') -> List[str]:
+        """Get list of tags that exist locally but not on remote.
+
+        Args:
+            remote: Remote name to compare against (default: 'origin')
+
+        Returns:
+            List of unpushed tag names
+        """
+        try:
+            # Get local tags
+            local_result = self._run_command(['git', 'tag', '-l'])
+            local_tags = set(tag.strip() for tag in local_result.stdout.strip().split('\n') if tag.strip())
+
+            # Get remote tags
+            try:
+                remote_result = self._run_command(['git', 'ls-remote', '--tags', remote])
+                remote_lines = remote_result.stdout.strip().split('\n')
+
+                # Parse remote tags (format: "hash refs/tags/tagname")
+                remote_tags = set()
+                for line in remote_lines:
+                    if not line:
+                        continue
+                    parts = line.split('refs/tags/')
+                    if len(parts) > 1:
+                        # Remove ^{} suffix for annotated tags
+                        tag_name = parts[1].replace('^{}', '')
+                        remote_tags.add(tag_name)
+
+                # Find tags that are local but not remote
+                unpushed = sorted(local_tags - remote_tags)
+                return unpushed
+
+            except subprocess.CalledProcessError:
+                # Remote not available, assume all tags are unpushed
+                return sorted(local_tags)
+
+        except subprocess.CalledProcessError:
+            return []
+
     def _run_command(self, cmd: List[str]) -> subprocess.CompletedProcess:
         """Run a git command.