general improvements (#17)

* refactor(hooks): simplify hook execution with shared context

- [x] Extract BaseInput struct to eliminate duplicate fields across hooks
- [x] Create RunHook handler pattern for session-start and user-prompt
- [x] Create RunStatuslineHook for fast statusline rendering without worker startup
- [x] Add HookContext struct to pass port, project, CWD, SessionID to handlers
- [x] Add db/interface.go with ObservationReader/Writer interfaces
- [x] Add comprehensive conflict management tests in sqlite/conflict_test.go
- [x] Add vector client tests for Count, ModelVersion, NeedsRebuild, GetStaleVectors
- [x] Add FilterByThreshold helper tests for query result filtering
- [x] Make handlers_test more robust for network-dependent update checks
- [x] Update package versions in UI

* Move to GORM + general cleanup

* feat(mcp): add observation relations discovery and scoring integration

- [x] Add find_related_observations MCP tool for discovering related observations by confidence
- [x] Integrate scoring calculator and recalculator into MCP server initialization
- [x] Add pattern, relation, and session stores to MCP server dependencies
- [x] Register MCP server in Claude Code settings during plugin installation
- [x] Update install scripts (bash, PowerShell) to configure MCP server settings
- [x] Switch plugin manifest files to template-based versioning (plugin.json.tpl, marketplace.json.tpl)
- [x] Update all MCP server tests to pass new dependency parameters

internal/vector/sqlitevec/helpers_test.go

@@ -572,3 +572,119 @@ func TestExtractedIDs_Empty(t *testing.T) {
 	assert.Nil(t, ids.SummaryIDs)
 	assert.Nil(t, ids.PromptIDs)
 }
+
+func TestFilterByThreshold(t *testing.T) {
+	tests := []struct {
+		name        string
+		results     []QueryResult
+		threshold   float64
+		maxResults  int
+		expectedLen int
+		expectedIDs []string
+	}{
+		{
+			name:        "empty_results",
+			results:     []QueryResult{},
+			threshold:   0.5,
+			maxResults:  0,
+			expectedLen: 0,
+		},
+		{
+			name: "all_above_threshold",
+			results: []QueryResult{
+				{ID: "doc-1", Similarity: 0.9},
+				{ID: "doc-2", Similarity: 0.8},
+				{ID: "doc-3", Similarity: 0.7},
+			},
+			threshold:   0.5,
+			maxResults:  0,
+			expectedLen: 3,
+			expectedIDs: []string{"doc-1", "doc-2", "doc-3"},
+		},
+		{
+			name: "some_below_threshold",
+			results: []QueryResult{
+				{ID: "doc-1", Similarity: 0.9},
+				{ID: "doc-2", Similarity: 0.4},
+				{ID: "doc-3", Similarity: 0.7},
+				{ID: "doc-4", Similarity: 0.3},
+			},
+			threshold:   0.5,
+			maxResults:  0,
+			expectedLen: 2,
+			expectedIDs: []string{"doc-1", "doc-3"},
+		},
+		{
+			name: "all_below_threshold",
+			results: []QueryResult{
+				{ID: "doc-1", Similarity: 0.3},
+				{ID: "doc-2", Similarity: 0.2},
+			},
+			threshold:   0.5,
+			maxResults:  0,
+			expectedLen: 0,
+		},
+		{
+			name: "max_results_limit",
+			results: []QueryResult{
+				{ID: "doc-1", Similarity: 0.9},
+				{ID: "doc-2", Similarity: 0.8},
+				{ID: "doc-3", Similarity: 0.7},
+				{ID: "doc-4", Similarity: 0.6},
+			},
+			threshold:   0.5,
+			maxResults:  2,
+			expectedLen: 2,
+			expectedIDs: []string{"doc-1", "doc-2"},
+		},
+		{
+			name: "max_results_with_threshold",
+			results: []QueryResult{
+				{ID: "doc-1", Similarity: 0.9},
+				{ID: "doc-2", Similarity: 0.3},
+				{ID: "doc-3", Similarity: 0.8},
+				{ID: "doc-4", Similarity: 0.2},
+				{ID: "doc-5", Similarity: 0.7},
+			},
+			threshold:   0.5,
+			maxResults:  2,
+			expectedLen: 2,
+			expectedIDs: []string{"doc-1", "doc-3"},
+		},
+		{
+			name: "exact_threshold_included",
+			results: []QueryResult{
+				{ID: "doc-1", Similarity: 0.5},
+				{ID: "doc-2", Similarity: 0.4},
+			},
+			threshold:   0.5,
+			maxResults:  0,
+			expectedLen: 1,
+			expectedIDs: []string{"doc-1"},
+		},
+		{
+			name: "zero_threshold",
+			results: []QueryResult{
+				{ID: "doc-1", Similarity: 0.1},
+				{ID: "doc-2", Similarity: 0.0},
+			},
+			threshold:   0.0,
+			maxResults:  0,
+			expectedLen: 2,
+			expectedIDs: []string{"doc-1", "doc-2"},
+		},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			filtered := FilterByThreshold(tt.results, tt.threshold, tt.maxResults)
+			assert.Len(t, filtered, tt.expectedLen)
+
+			if tt.expectedLen > 0 {
+				for i, id := range tt.expectedIDs {
+					assert.Equal(t, id, filtered[i].ID)
+				}
+			}
+		})
+	}
+}