added Oracle DB Observability

[JoseLuisC99]

Description

Adds the OCI Oracle Database Observability MCP server package with two MCP server entry points:

• oracle.oci-opsi-mcp-server for Operations Insights observability tools
• oracle.oci-dbm-mcp-server for Database Management observability tools

The change includes typed MCP tools, OCI SDK client/auth integration, pagination and response mapping helpers, generated Pydantic models,
README setup guidance, package metadata, lockfile, and unit tests with coverage enforcement.

Dependencies required by this package are declared in pyproject.toml: fastmcp==3.2.4, oci==2.174.0, and pydantic==2.12.3.

Fixes #342

Type of change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• This change requires a documentation update

How Has This Been Tested?

• uv run python -m compileall oracle
• Verified both pyproject.toml console entry-point modules import successfully.
• uv run python -m pytest --cov=. --cov-branch --cov-report=term-missing
• make lint
• git diff --check main

Test Configuration:

• Firmware version: N/A
• Hardware: macOS arm64
• Toolchain: Python 3.13.3, uv 0.6.17, pytest 9.0.3
• SDK: OCI Python SDK 2.174.0, FastMCP 3.2.4

Checklist:

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings (dependency warning from fastmcp/authlib, Remediate Dependabot alerts for Python dependencies across Oracle and OCI MCP servers #340)
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes
• Any dependent changes have been merged and published in downstream modules