Add Sentry observability to the `agents`. Introduce a dedicated
`observability.py` module. Refactor both agents to use the shared
observability layer and extract task helpers into a new `tasks.py` module,
making task execution easier to instrument and maintain.
Pin urllib3 to >=2.7.0 via uv constraint-dependencies to fix a moderate
severity decompression DoS vulnerability. Affected versions (2.6.0 to
<2.7.0) could fully decode a compressed response body in a single
operation, leading to excessive CPU and memory consumption.
Pin idna to >=3.15 via uv constraint-dependencies to fix a moderate
severity (CVSS 5.3) information disclosure vulnerability. The flaw is
network-exploitable with no authentication required.