poc-memory v0.4.0: graph-structured memory with consolidation pipeline

Rust core:
- Cap'n Proto append-only storage (nodes + relations)
- Graph algorithms: clustering coefficient, community detection,
  schema fit, small-world metrics, interference detection
- BM25 text similarity with Porter stemming
- Spaced repetition replay queue
- Commands: search, init, health, status, graph, categorize,
  link-add, link-impact, decay, consolidate-session, etc.

Python scripts:
- Episodic digest pipeline: daily/weekly/monthly-digest.py
- retroactive-digest.py for backfilling
- consolidation-agents.py: 3 parallel Sonnet agents
- apply-consolidation.py: structured action extraction + apply
- digest-link-parser.py: extract ~400 explicit links from digests
- content-promotion-agent.py: promote episodic obs to semantic files
- bulk-categorize.py: categorize all nodes via single Sonnet call
- consolidation-loop.py: multi-round automated consolidation

Co-Authored-By: Kent Overstreet <kent.overstreet@linux.dev>

Cargo.toml

@@ -0,0 +1,28 @@
+[package]
+name = "poc-memory"
+version = "0.4.0"
+edition = "2021"
+
+[dependencies]
+capnp = "0.20"
+uuid = { version = "1", features = ["v4"] }
+serde = { version = "1", features = ["derive"] }
+serde_json = "1"
+regex = "1"
+rand = "0.8"
+libc = "0.2"
+
+[build-dependencies]
+capnpc = "0.20"
+
+[[bin]]
+name = "poc-memory"
+path = "src/main.rs"
+
+[[bin]]
+name = "memory-search"
+path = "src/bin/memory-search.rs"
+
+[profile.release]
+opt-level = 2
+strip = true