fix(hermes): use the user TraceDecay profile

[ScriptedAlchemy]

Summary

• remove Hermes-home/profile storage routing, CLI flags, MCP schemas, automation bridges, and compatibility fallbacks
• keep ~/.hermes only as the host plugin/config/transcript source location; runtime data uses the ordinary user-profile project shard
• migrate legacy Hermes sessions and facts transactionally, including facts-only stores, moved/renamed/symlinked projects, collision detection, idempotent ledgers, and safe install/update cutover

Tests

• cargo test --lib migrate::hermes
• cargo test --test agent_suite hermes
• cargo test --test hermes_suite
• cargo test --test storage_suite
• cargo clippy --all-targets --all-features -- -D warnings

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[ScriptedAlchemy]

Cross-session diagnosis (Fable): the Linux/macOS failures are mcp::tools::handlers::tests::test_tool_definitions_complete (mod.rs:988) — a definitions/dispatch registry consistency assertion. Master moved under this branch: #392 registered a new tool (tracedecay_ast_grep_search, unconditionally — no binary gating), so the merge ref's expected tool set differs from what this branch's Hermes-strip removals were counted against. A rebase onto current master (re-running the registry lockstep tests after) should clear it; no fault in the strip itself. Related: the strip inventory from the earlier recalled agent is stored as fact #159 (STRIP vs KEEP split incl. the migrate-inventory StoreRole judgment and the never-constructed StoreKind::HermesProfile) if useful for cross-checking coverage.

🤖 Diagnosis by Claude Code

[ScriptedAlchemy]

Release blockers from local review:

• resolve_project_candidate fails moved/symlink aliases on macOS (/var vs /private/var); current macOS migration tests are red.
• detected_plugin_dirs/uninstall ignore legacy named-profile, HERMES_HOME, and project-local plugins/stores, leaving stale active installs. Removal of special runtime routing still requires one-time discovery/migration/cleanup.
• copy_memory_facts/copy_memory_feedback/copy_table use silent collision ignores: same-content facts lose source trust/feedback and session/LCM key conflicts can conflate rows. Merge explicitly and record collisions.
• enable_plugin_config removes the project pin before legacy state.db rows lacking sessions.cwd are imported/routed, making them unrouteable.
• Non-Windows CI is red: test_tool_definitions_complete expects 102 tools but sees 101.

Please fix and rerun non-Windows CI before merge.