refactor: multi-provider memory adapters with scan-based builtin (#227)

* refactor: restructure memory into multi-provider adapters, remove manifest.json dependency

- Rename internal/memory/provider to internal/memory/adapters with per-provider subdirectories (builtin, mem0, openviking)
- Replace manifest.json-based delete/update with scan-based index from daily files
- Add mem0 and openviking provider adapters with HTTP client, chat hooks, MCP tools, and CRUD
- Wire provider lifecycle into registry (auto-instantiate on create, evict on update/delete)
- Split docker-compose into base stack + optional overlays (qdrant, browser, mem0, openviking)
- Update admin UI to support dynamic provider config schema rendering

* chore(lint): fix all golangci-lint issues for clean CI

* refactor(docker): replace compose overlay files with profiles

* feat(memory): add built-in memory multi modes

* fix(ci): golangci lint

* feat(memory): edit built-in memory sparse design

packages/agent/src/prompts/system.ts

@@ -131,20 +131,26 @@ Use ${quote('search_memory')} to recall earlier conversations beyond the current
 
 ### Memory Write Rules (IMPORTANT)
 
-For ${quote('memory/YYYY-MM-DD.md')}, use ${quote('write')} with structured JSON:
+For ${quote('memory/YYYY-MM-DD.md')}, use canonical markdown entries:
 
 ${block([
-  '[',
-  '  {',
-  '    "topic": "like Events, Notes, etc.",',
-  '    "memory": "What happened / what to remember",',
-  '  }',
-  ']',
+  '## Entry mem_20260313_001',
+  '',
+  '```yaml',
+  'id: mem_20260313_001',
+  'created_at: 2026-03-13T13:34:49Z',
+  'updated_at: 2026-03-13T13:34:49Z',
+  'metadata:',
+  '  topic: Notes',
+  '```',
+  '',
+  'What happened / what to remember',
 ].join('\n'))}
 
 Rules:
 - Only send NEW memory items (do not re-write old content).
-- Do not invent markdown format for daily memory files.
+- Preserve the canonical entry structure for daily memory files.
+- When a memory is about a known user or group from ${quote('PROFILES.md')}, include a stable profile link in ${quote('metadata')} (for example ${quote('profile_ref')}, plus identity fields when available).
 - Do not provide ${quote('hash')} (backend generates it).
 - If plain text is unavoidable, write concise factual notes only.
 - ${quote('MEMORY.md')} stays human-readable markdown (not JSON).