…with Cypher query

Implements cluster detection logic for detecting MemoryNodes with sufficient
high-weight neighbors at the same layer:

- Add clusterCandidate struct to hold query results (NodeID, Layer, Embedding, NeighborIDs)
- Add queryClusterCandidates function with Cypher query that:
  - Matches CO_ACTIVATED_WITH edges with weight >= threshold
  - Filters to same-layer nodes (a.layer = b.layer)
  - Groups by node and collects neighbors
  - Filters to nodes with >= minClusterSize-1 neighbors
  - Orders results by neighbor count descending
- Add asStringSlice helper for Neo4j array conversion

Follows patterns from cmd/decay/main.go for Neo4j session handling and
type conversion helpers.

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

…candidates into non-overlapping clusters

Implements greedy first-come cluster assignment algorithm:
- Added clusterMember and cluster structs for cluster representation
- buildClusters processes candidates in order (highest neighbor count first)
- Each node can only belong to one cluster (first-come assignment)
- Clusters smaller than minSize are discarded
- Embeddings are preserved for averaging in later subtasks

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

…mpute centroid embedding

Add averageEmbeddings function that:
- Computes element-wise average of multiple embedding vectors
- Returns nil for empty input
- Handles mismatched dimensions gracefully by skipping invalid embeddings
- Uses validCount to ensure proper averaging even with some skipped embeddings
- Determines dimension from first valid (non-nil, non-empty) embedding

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

…Cypher query

- Add createAbstraction function that creates MemoryNode at layer+1
- Creates ABSTRACTS_TO edges from cluster members to abstraction node
- Add abstractionResult struct to hold creation result (NodeID, MemberCount)
- Add generateAbstractionName helper to create readable names from member IDs
- Follows learning/service.go patterns for Neo4j session handling

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

…hestrating detection, clustering, and promotion

Implements the main orchestration function for the consolidation job:
- Step 1: Query cluster candidates via queryClusterCandidates()
- Step 2: Build clusters via buildClusters() with greedy first-come assignment
- Step 3: Process clusters and create abstractions or report for dry-run

Features:
- Respects --max-promotions cap to limit number of abstraction nodes
- Supports --dry-run mode that reports what would happen without database writes
- Tracks statistics: clusters found, nodes promoted, edges created, skipped counts
- Handles edge cases: no candidates, no qualifying clusters, missing embeddings

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

…d output

- Enhanced printStats function with detailed statistics output
- Added clusterSample struct to track sample clusters for display
- Added sample cluster collection in runConsolidationJob (first 5 clusters)
- Output shows: clusters found, nodes promoted/to promote, edges created/to create
- Shows skipped cluster counts (no embedding, too small)
- Displays sample clusters with member counts, layer transitions, and member IDs
- Added truncateID helper for readable UUID display
- Follows decay job pattern for consistent user experience

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

…erageEmb

Add comprehensive unit tests for cmd/consolidate following cmd/decay/main_test.go patterns:

- TestAverageEmbeddings: verifies centroid calculation of multiple embedding vectors
- TestAverageEmbeddings_Empty: returns nil for empty input
- TestAverageEmbeddings_MismatchedDims: handles mismatched dimensions gracefully
- TestBuildClusters: groups nodes correctly by adjacency
- TestBuildClusters_MinSize: excludes clusters smaller than min size
- TestBuildClusters_LayerPreserved: cluster layer matches candidate layer
- TestBuildClusters_EmbeddingsPreserved: embeddings copied to cluster members
- TestConfigValidation_*: min cluster size, weight threshold, max promotions
- TestAsConversionHelpers: safe conversion of Neo4j types
- TestAsFloat64Slice/TestAsStringSlice: slice conversion helpers
- TestTruncateID: ID truncation helper
- TestGenerateAbstractionName: abstraction name generation

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

Verified complete CLI execution against live Neo4j:
- Banner prints "MDEMG Consolidation Job" ✅
- CLI connects to Neo4j successfully ✅
- Dry-run mode displays correct configuration ✅
- Custom flags work (min-cluster-size, weight-threshold, max-promotions) ✅
- Required --space-id flag enforcement ✅
- Input validation works (min-cluster-size >= 2, weight-threshold 0-1) ✅
- All 14 unit tests pass ✅

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

…quested)

Fixes:
- Remove compiled binary mdemg_build/service/consolidate from repo (7.4MB)
- Add /mdemg_build/service/consolidate to .gitignore to prevent future accidents

Verified:
- Binary removed from git tracking
- .gitignore updated with new entry

QA Fix Session: 1

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