chore: track all project map and index files

Add generated .pi-map.md and .pi-map.index.md files across the repository
so the project navigation maps are shared and versioned. These artifacts
are maintained by project_map_init/patch/validate and must be kept in
sync with source edits.

Note: .cache/ remains ignored (added in previous commit).

.stoneforge/.pi-map.index.md

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+# .stoneforge (index)
+dir: .stoneforge
+
+## role
+Hidden system directory storing runtime state, configuration, and version-control metadata for the Stoneforge application.
+## parent
+index: ./.pi-map.index.md
+map: ./.pi-map.md
+## children
+- .stoneforge/sync
+  index: .stoneforge/sync/.pi-map.index.md
+  map: .stoneforge/sync/.pi-map.md
+## files
+- .dashboard-opened
+- .gitignore
+- config.yaml
+## links
+index: .stoneforge/.pi-map.index.md
+map: .stoneforge/.pi-map.md
+## workflows
+-
+## dirty
+-

.stoneforge/.pi-map.md

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+# .stoneforge
+dir: .stoneforge
+
+index: .stoneforge/.pi-map.index.md
+
+## role
+Hidden system directory storing runtime state, configuration, and version-control metadata for the Stoneforge application.
+## files
+- .dashboard-opened | Stores timestamp and identifier data for tracking when a dashboard was opened
+- .gitignore | Specifies files and patterns for Git to ignore in version control
+- config.yaml | Configuration file for the Stoneforge application defining database, sync, playbook, identity, merge, workflow, and agent settings.
+## arch
+Simple flat-file storage with YAML-based configuration, dotfile-based state tracking, and standard Git ignore patterns.
+## tags
+config, stores, timestamp, identifier, data, tracking, dashboard, was
+## symbols
+-
+## workflows
+-
+## dirty
+-

.stoneforge/sync/.pi-map.index.md

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+# .stoneforge/sync (index)
+dir: .stoneforge/sync
+
+## role
+Distributed task coordination and ephemeral worker agent management for a multi-agent execution system.
+## parent
+index: .stoneforge/.pi-map.index.md
+map: .stoneforge/.pi-map.md
+## children
+-
+## files
+- dependencies.jsonl
+- elements.jsonl
+## links
+index: .stoneforge/sync/.pi-map.index.md
+map: .stoneforge/sync/.pi-map.md
+## workflows
+-
+## dirty
+-

.stoneforge/sync/.pi-map.md

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+# .stoneforge/sync
+dir: .stoneforge/sync
+
+index: .stoneforge/sync/.pi-map.index.md
+
+## role
+Distributed task coordination and ephemeral worker agent management for a multi-agent execution system.
+## files
+- dependencies.jsonl | Stores a sequence of dependency relationships between entities in JSON Lines format, tracking parent-child, blocking, and reply relationships with timestamps and creators.
+- elements.jsonl | Stores JSONL records of ephemeral worker agents with their session history, worktree assignments, and lifecycle metadata for a distributed task execution system.
+## arch
+Event-sourced JSONL append-only logs with entity-relationship graph tracking, session-based worker lifecycle management, and decentralized worktree assignment.
+## tags
+stores, relationships, dependencies, elements, sequence, dependency, entities, json
+## symbols
+-
+## workflows
+-
+## dirty
+-