## Context
As per PR title - we're currently showing a "danger" state for the
blocked by metric card as long as there's at least query that's blocked.
This may come off as too noisy in a real database scenario hence opting
to fine tune this behaviour a little
## Changes involved
We'll now only show the "danger" state for the blocked by metric card if
any of the blocked queries are blocked for longer than 10 seconds
<img width="356" height="256" alt="image"
src="https://github.com/user-attachments/assets/e7db5d7e-749a-4c4e-b519-9433a639b0a0"
/>
Otherwise will just be a default card
<img width="359" height="266" alt="image"
src="https://github.com/user-attachments/assets/f9aad85f-8d74-4f55-a3c5-a859d46bd8c1"
/>
<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->
## Summary by CodeRabbit
- **New Features**
- Added clearer blocked-query monitoring, including the longest-blocked
process and duration.
- Added interactive selection for the longest-blocked process.
- **Bug Fixes**
- Improved activity-duration tracking across active and
idle-in-transaction states.
- Blocked-query warnings now reflect duration thresholds rather than
query count alone.
- Prevented negative duration values in blocked-query metrics.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->
## Context
Adds a "Top blocker" overview card for Database Connections
This should provide a better signal if there's any process that's
behaving as a bottleneck for multiple blocked queries
<img width="977" height="256" alt="image"
src="https://github.com/user-attachments/assets/3d5129a8-f0d7-40a6-808e-0d902889d997"
/>
^ We only highlight the card in red if the query is blocking more than 3
other queries to account - otherwise the signal might be too noisy
<img width="965" height="262" alt="image"
src="https://github.com/user-attachments/assets/f3fda77a-8d52-4e5d-8717-66a26f511a3c"
/>
## Other changes involved
- Am swapping the card positions around a little
- Longest running query card shows the PID as the primary information,
followed by the duration of the run
<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->
## Summary by CodeRabbit
* **New Features**
* Added a **Top blocker** metric to the Database Connections Overview to
highlight the PID/account blocking the most other queries.
* Warning styling now appears when a query blocks more than **3** other
queries.
* Reorganized the metrics layout and ordering for improved visibility
(active, idle-in-transaction, blocked, top blocker, and longest
running).
* **Bug Fixes**
* Updated tooltip and guidance text for clearer explanations of blocked
and idle-in-transaction states.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->
## Context
Building on top of "Database Connections" - this adds a top summary
section, again from `pg_stat_activity`
<img width="948" height="324" alt="image"
src="https://github.com/user-attachments/assets/f4968193-0a5f-4754-a630-40685b747999"
/>
Each block comes with a tooltip in hopes to educate the significance of
each metric
- Connections: Spread of connections per database role
<img width="313" height="164" alt="image"
src="https://github.com/user-attachments/assets/8ceeab5d-b960-4be3-9a5b-8600bd5cf303"
/>
- Active queries: Rough representative of activity
<img width="350" height="196" alt="image"
src="https://github.com/user-attachments/assets/f9705ff1-a869-409a-86b6-50170a169674"
/>
- Idle in transaction: Important to identify as this indicates locks
(Suggests root cause)
<img width="350" height="196" alt="image"
src="https://github.com/user-attachments/assets/f9705ff1-a869-409a-86b6-50170a169674"
/>
- Blocked queries: Also important to identify stuck queries
<img width="335" height="183" alt="image"
src="https://github.com/user-attachments/assets/57255fb8-24f6-4ddd-aa54-850a77173b5c"
/>
- Longest running query: Might be useful to identify unusually long
queries
- Will be `text-warning` if exceeds 30 seconds for active queries,
`text-destructive` if exceeds 10 seconds for queries idle in transaction
<img width="342" height="119" alt="image"
src="https://github.com/user-attachments/assets/f6783b43-058a-4a32-a40c-0bc64f23d2ce"
/>
"Summarize activity" CTA leverages on the Assistant to give a quick
overview - highlights any potential issues for quick reference
<img width="1918" height="958" alt="image"
src="https://github.com/user-attachments/assets/340121fe-3186-48a5-8023-fbac2a93397a"
/>
## Other changes
- Hides "View running queries" in SQL Editor if `topForPostgres` feature
flag is enabled (since this UI is meant to replace that)
<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->
## Summary by CodeRabbit
* **New Features**
* Added a Database Connections observability overview with metric cards
(connections, longest-running, active, blocked, idle-in-transaction) and
an interactive “Longest running” PID selector.
* Added a “Summarize activity” AI assistant dropdown that starts a
timestamped, activity-aware summary chat.
* **Improvements**
* Enhanced live activity refresh (including window-focus updates) and
standardized duration warning thresholds for active and
idle-in-transaction sessions.
* Improved hover details for query previews and allowed richer tooltip
content for metric labels.
* **Feature Changes**
* Gated the “View running queries” bottom panel behind a feature flag.
* **Bug Fixes**
* Refined running-too-long badge and warning styling for
idle-in-transaction cases.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->
Joshen Lim