feat: Vestige v1.7.0 — 18 tools, automation triggers, SQLite perf

Tool consolidation: 23 → 18 tools
- ingest merged into smart_ingest (single + batch mode)
- session_checkpoint merged into smart_ingest batch (items param)
- promote_memory/demote_memory merged into memory(action=promote/demote)
- health_check/stats merged into system_status

Automation triggers in system_status:
- lastDreamTimestamp, savesSinceLastDream, lastBackupTimestamp,
  lastConsolidationTimestamp — enables Claude to conditionally
  trigger dream/backup/gc/find_duplicates at session start
- Migration v6: dream_history table (dreams were in-memory only)
- DreamHistoryRecord struct + save/query methods
- Dream persistence in dream.rs (non-fatal on failure)

SQLite performance:
- PRAGMA mmap_size = 256MB (2-5x read speedup)
- PRAGMA journal_size_limit = 64MB (prevents WAL bloat)
- PRAGMA optimize = 0x10002 (fresh query planner stats on connect)
- FTS5 segment merge during consolidation (20-40% keyword boost)
- PRAGMA optimize during consolidation cycle

1,152 tests passing, 0 failures, release build clean.

docs/integrations/windsurf.md

@@ -115,7 +115,7 @@ It remembers.
 
 ## Important: Tool Limit
 
-Windsurf has a **hard cap of 100 tools** across all MCP servers. Vestige uses ~19 tools, leaving plenty of room for other servers.
+Windsurf has a **hard cap of 100 tools** across all MCP servers. Vestige uses ~18 tools, leaving plenty of room for other servers.
 
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docs/integrations/xcode.md

@@ -51,7 +51,7 @@ Quit Xcode completely (Cmd+Q) and reopen your project.
 
 ### 4. Verify
 
-Type `/context` in the Agent panel. You should see `vestige` listed with 23 tools.
+Type `/context` in the Agent panel. You should see `vestige` listed with 18 tools.
 
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