chore: bump version to 0.8.0

[RafaelPo]

Summary

• Bump version from 0.7.0 to 0.8.0 across all 4 packages (futuresearch, futuresearch-mcp, everyrow stub, everyrow-mcp stub)
• Updates pyproject.toml, manifest.json, and server.json

New features since 0.7.0:

• document_query_llm param for agent_map / agent_map_async
• llm param for dedupe / dedupe_async
• Session rename support (session_name + session_id together)
• conversation_id param in create_session
• MCP: widget UX fixes, activity rehydration, deferred polling instructions, active worker counts

Test plan

• Verify CI passes
• After merge, create GitHub Release with tag v0.8.0 to trigger PyPI publish

🤖 Generated with Claude Code

[sentry]

Bug: The version number was not updated in gemini-extension.json and .claude-plugin/marketplace.json, which will cause the test_version_consistency CI check to fail.
_{Severity: HIGH}

Suggested Fix

Update the version field in both gemini-extension.json and .claude-plugin/marketplace.json from 0.7.0 to 0.8.0 to match the version specified in pyproject.toml.

Prompt for AI Agent

Review the code at the location below. A potential bug has been identified by an AI
agent.
Verify if this is a real issue. If it is, propose a fix; if not, explain why it's not
valid.

Location: pyproject.toml#L11

Potential issue: The version number was updated to `0.8.0` in `pyproject.toml` but was
not updated in `gemini-extension.json` and `.claude-plugin/marketplace.json`, where it
remains `0.7.0`. An automated CI test, `test_version_consistency()`, explicitly checks
for version consistency across these files. Due to this mismatch, the test will fail
with an assertion error, blocking the CI/CD pipeline and preventing the pull request
from being merged.

_{Did we get this right? 👍 / 👎 to inform future reviews.}

[rgambee]

We should make this change in delphos instead. It will be copied to this repo automatically. If we PR it here, the two repos will diverge, which we don't want. See delphos PR#5044 for an example.

[RafaelPo]

Closing — will PR this from delphos instead to avoid sync divergence.