Make Pallas truly stateless per the 'Pallas is ephemeral' contract.
BREAKING (behavioural, not API):
* instance_scope changes from 'shared' to 'request' in pallas.server.
Each MCP tools/call now acquires a freshly-created fast-agent instance
via the existing create_instance / dispose_instance factories and
disposes it immediately after the response.
With 'shared' mode:
* Every MCP caller saw the same agent.message_history, so different
Daedalus conversations leaked into each other.
* Mid-chat context was silently truncated once the model window filled.
* Restarting the Pallas process wiped all in-flight conversation state,
even though Daedalus had it persisted in Postgres.
With 'request' mode the Pallas process holds no per-conversation state;
the caller (Daedalus) owns history and reseeds it on every turn.
send_message gains two optional arguments:
* history: list[{role, content, images?}] in chronological order,
converted to PromptMessageExtended and seeded onto the fresh
instance's message_history before agent.send().
* conversation_id: opaque string, logged for trace correlation only —
Pallas never interprets or persists it.
Malformed history entries (bad role, missing image data/mime_type, etc.)
are skipped with a warning rather than raising, so a single bad row
cannot wipe a whole conversation.
The {agent}_history MCP prompt is still registered under 'request'
scope for backward compatibility but always returns []; history lives
on the client.
Version bumped to 0.2.0.
Extend `_HealthAccessFilter` to also drop uvicorn access log lines for
successful `POST /mcp` requests, in addition to the existing
`/live`, `/ready`, and `/metrics` health probes.
**Why:** Every Daedalus health poll and tool call hits the single `/mcp`
route. Pallas already emits structured `mcp_request_start` /
`mcp_request_complete` logs at the agent layer, making the uvicorn
access line pure duplication and noise in syslog.
**How:**
- Replace the simple substring list `_HEALTH_PATHS` with compiled regex
patterns (`_HEALTH_PATH_RE`, `_MCP_RE`) for more precise path matching
- Add `_SUCCESS_STATUS_RE` to only suppress 1xx/2xx/3xx responses;
non-successful responses (4xx, 5xx) still pass through as real signals
- Update docstring to document the new suppression rules clearly
Swap out the standard `MCPToolProgressManager` from fast-agent with
the local `EnrichedMCPToolProgressManager` from `pallas.progress` to
provide richer progress reporting during tool execution in the
multimodal MCP server.
Add optional `model` and `model_capabilities` fields to agent definitions
in agents.yaml, allowing each agent to target a different model/provider
with its own capability parameters (vision, context_window, etc.).
- Refactor `_build_agents_table` to return rich dicts instead of tuples
- Extract `_register_one_model` from `_register_unknown_models` for reuse
- Register per-agent models in addition to the global default_model,
falling back to top-level model_capabilities when agent-specific ones
are not provided
- Override `AgentConfig.model` at startup when an agent declares a model
- Thread deployment_config through `_preflight` and `_start_agent`
